The hermeneutic style is a style of Latin in the later Roman and early Medieval periods characterised by the extensive use of unusual and arcane words, especially derived from Greek. The style is first found in the work of Apuleius in the second century, and then in several late Roman writers. In the early medieval period, some leading Continental scholars were exponents, including Johannes Scotus Eriugena and Odo of Cluny.

In England, the seventh-century bishop Aldhelm was the most influential hermeneutic writer; Latin scholarship declined in the ninth century, and when it revived in the tenth, the hermeneutic style became increasingly influential. Unlike in continental Europe, where it was used only by a minority of writers, in tenth-century England it became nearly universal. It was the house style of the English Benedictine Reform, the most important intellectual movement in later Anglo-Saxon England. The style fell out of favour after the Norman Conquest, and the twelfth-century chronicler William of Malmesbury described it as disgusting and bombastic. Historians were equally dismissive until the late twentieth century, when scholars such as Michael Lapidge argued that it should be taken seriously as an important aspect of late Anglo-Saxon culture.

Definition In 1953, Alistair Campbell argued that there were two principal styles of Latin in Anglo-Saxon England. One, which he called the classical, was exemplified by the writings of Bede (c. 672–735), while the English bishop Aldhelm (c. 639–709) was the most influential author of the other school, which extensively used rare words, including Greek ones derived from "hermeneutic" glossaries. Andy Orchard contrasts the "limpid and direct prose style of Bede, with its basically biblical vocabulary and syntax" with the "highly elaborate and ornate style of Aldhelm, with a vocabulary and syntax ultimately derived from Latin verse". Aldhelm was the most learned man in the first four centuries of Anglo-Saxon Christianity, with a profound knowledge of Latin poetry (unlike Bede). His style was highly influential in the two centuries after his death, and it was dominant in later Anglo-Saxon England. Borrowing from Greek was not confined to hermeneutic writers of Latin. In a 2005 study, J. N. Adams, Michael Lapidge and Tobias Reinhardt observe that "the exhumation of (poorly understood) Greek words from Greek-Latin glossaries for purposes of stylistic ornamentation was widespread throughout the Middle Ages."

In the preface to his 1962 edition of Æthelweard's Chronicon, Campbell referred to the "hermeneutic tradition". In 1975, Michael Lapidge developed Campbell's distinction in an essay on the "hermeneutic style". He stated that the term implies that the vocabulary is based mainly on the Hermeneumata, a name for certain Greek-Latin glossaries. He did not consider the term entirely satisfactory, and suggested that "glossematic" would be an alternative, but adopted "hermeneutic" because it had been used by other scholars. Jane Stevenson also expresses dissatisfaction with the term, and in the view of Rebecca Stephenson: "The word "hermeneutic" itself is misleading, since this style has nothing to do with the modern field of hermeneutics, nor does it feature words drawn from the Hermeneumata, a set of Greek and Latin glossaries, from which its exotic vocabulary was once thought to derive." However, both scholars reluctantly accept the term. The style was formerly called "Hisperic", but scholars now reject this term as wrongly suggesting that it is Irish, and think "Hisperic" should be confined to the language of the very obscure Hisperica Famina.

Lapidge states:

Early development

The hermeneutic style was possibly first seen in the Metamorphoses of Apuleius in the second century, and it is also found in works by late Latin writers such as Ammianus Marcellinus and Martianus Capella. In Britain and Ireland, the style is found in authors on the threshold of the medieval period, including the British monk Gildas, the Irish missionary Columbanus and the Anglo-Saxon bishop Aldhelm, and works such as the Hisperica Famina. The Anglo-Saxons were the first people in Europe who had to learn Latin as a foreign language when they converted to Christianity, and in Lapidge's view: "That they attained stylistic mastery in a medium alien to them is remarkable in itself".

The influential ninth-century Irish philosopher Johannes Scotus Eriugena had a thorough knowledge of Greek, and through his translations and use of unusual Greek words in poetry helped to raise the prestige of the hermeneutic style. The style became fashionable at Laon, where Johannes's colleague and fellow Irishman, Martianus Hiberniensis, lectured. Hincmar of Rheims rebuked his nephew, Hincmar of Laon:

Continental Europe The style is found in several centres on the Continent in the tenth century. In Italy, the leading proponents were Liutprand of Cremona, Eugenius Vulgarius and Atto of Vercelli. In Germany, works which display it include the anonymous Gesta Apollonnii and the letters of Froumond of Tegernsee. French works which display the hermeneutic style include Dudo of Saint-Quentin's Gesta Normanniae Ducum and the Libellus Sacerdotalis by Lios Monocus.

Two other French authors were particularly influential in England. The first two books of Abbo of Saint-Germain's Bella Parisiacae Vrbis describe the siege of Paris by the Normans from 888 to 895; they received very little circulation. However, in order to make the work a trinity (three-volume work) he added a book described by Lapidge as "a series of exhortations to the monastic life … written in a fiercely tangled and often inscrutable Latin whose vocabulary is nearly all glossary-based". This became a very popular textbook, especially in England. The other influential French author was Odo of Cluny, who was probably a mentor of Oda, Archbishop of Canterbury (941–958), a driving force behind the English Benedictine Reform and a proponent of the hermeneutic style. Lapidge suggests that the style in northern France was particularly associated with centres of the Cluniac (Benedictine) reform, and the leading figures in the English reform, Oda, Dunstan, Æthelwold and Oswald, were all practitioners of the hermeneutic style and had strong connections with Continental Benedictine centres. Lapidge argues: One might surmise that the hermeneutic style was cultivated energetically in England in an attempt to show that English learning was as profound and English writing as sophisticated as anything produced on the Continent. The impetus for the cultivation of the style in tenth-century England was therefore probably of Continental origin.

A late proponent of the style was the German Thiofrid of Echternach, abbot of Echternach between 1083 and 1110, who was strongly influenced by Aldhelm.

England On the Continent, some writers were exponents of the hermeneutic style; in England in the later tenth century almost all were. The study of difficult texts had been a traditional part of Latin education in England since the days of Aldhelm, and he profoundly influenced later writers. In tenth-century England, Aldhelm and Abbo were studied intensively, whereas hermeneutic works did not form an important part of the Continental curriculum. Aldhelm is described by David Dumville as "the father both of English latinity and of the hermeneutic style of Anglo-Latin letters". His De Virginitate (On Virginity) was particularly influential, and in the 980s an English scholar requested permission from Archbishop Æthelgar to go to Winchester to study it, complaining that he had been starved of intellectual food. A passage in De Virginitate reads: So, against the dread beast of pride and against these sevenfold brutes of poisonous vices, which strive cruelly to tear apart with their rabid teeth and virulent fangs all who are unarmed, despoiled of the cuirass of virginity and stripped of the shield of chastity, the virgins of Christ and the young champions of the church must fight with muscle and strength. Against, as it were, the ferocious legions of the barbarians, which in their troops never cease to batter the tortoise of the soldiers of Christ with the artillery of guileful fraud, the struggle must go on manfully, fought with the darts of spiritual weaponry and the iron-tipped spears of the virtues. Let us not, like timid soldiers who effeminately dread the shock of war and the call of the trumpeter, inertly offer to the ravening foe the backs of our shoulders rather than the bosses of our shields!

Anglo-Latin suffered a severe decline in the ninth century, partly due to the Viking invasions, but it began to revive in the 890s under Alfred the Great, who revered Aldhelm. Asser's Life of King Alfred has a hermeneutic flavour. Alfred was assisted by scholars he brought in from continental Europe. One of them was a German, John the Old Saxon, and in Lapidge's view a poem he wrote praising the future King Æthelstan, and punning on the Old English meaning of Æthelstan as "noble stone", marks an early sign of a revival of the hermeneutic style:

You, prince, are called by the name "sovereign stone", Look happily on this prophecy for your age: You shall be the "noble rock" of Samuel the Seer, [Standing] with mighty strength against devilish demons. Often an abundant cornfield foretells a great harvest; in Peaceful days your stony mass is to be softened. You are more abundantly endowed with the holy eminence of learning. I pray you may seek, and the Glorious One may grant, the [fulfilment implied in your] noble name.

The revival of the hermeneutic style was assisted by foreign scholars at the court of King Æthelstan in the late 920s and 930s, some of them, such as Israel the Grammarian, practitioners of hermeneutic Latin. The style was first seen in tenth-century England in charters drafted between 928 and 935 by an anonymous scribe of King Æthelstan called by scholars "Æthelstan A", who was strongly influenced by Aldhelm and by Hiberno-Latin works which may have been brought to England by Israel. According to Scott Thompson Smith, the charters of "Æthelstan A": "are generally characterised by a rich pleonastic style with aggressively literary proems and anathemas, ostentatious language and imagery throughout, decorative rhetorical figures, elaborate dating clauses and extensive witness lists." The charters are first seen shortly after Æthelstan had become the first king of all England by his conquest of Viking-ruled Northumbria in 927, and in the view of Mechthild Gretsch the charters are the result of "the affection of a style associated with a glorious intellectual past in order to boost what was conceived as a glorious military and political achievement".

David Woodman gives a translation of the start of a charter drafted by "Æthelstan A", S 416 issued on 12 November 931:

The lamentable and loudly detestable sins of this tottering age, surrounded by the dire barkings of obscene and fearsome mortality, challenge and urge us, not carefree in a homeland where peace has been attained but, as it were, teetering over an abyss of fetid corruption, that we should flee those things not only by despising them together with their misfortunes with the whole effort of our mind but also by hating them just like the wearisome nausea of melancholy, striving towards that Gospel text, "Give and it will be given unto you".