enmity

The Latin word amicus meant friend, and it came from amare, to love. Roman jurists used its opposite, inimicus, meaning not a friend, to describe anyone in an adversarial legal or social relationship. The abstract noun inimicitia, the state of being an enemy, appeared in Cicero's letters and in Roman legal texts from the 1st century BC. It was a precise term, distinguishing personal hostility from the public category of hostis, the enemy of the state.

Medieval French took the Latin word through a series of sound shifts and contractions. Inimicitia became enemistié in 12th-century Old French, losing its Latin prefix and compressing its vowels. The Old French word passed into Middle English in the 13th or 14th century, appearing in texts as enemyte, enmitee, and finally enmity by the 16th century. The spelling settled into its modern form by the time of the King James Bible in 1611, where Genesis 3:15 declares: I will put enmity between thee and the woman.

Enmity occupies a specific emotional register in English, more formal and sustained than hatred, more impersonal than grudge. It implies a structured opposition rather than a momentary feeling. Shakespeare used it to name the foundational conflict of Romeo and Juliet: the enmity between the Montagues and Capulets is not a quarrel but an institution. Political writers from Milton to Burke used it to describe the durable hostility between nations and factions, treating enmity as something that could be inherited or institutionalized.

Thomas Hobbes used enmity in Leviathan in 1651 to describe the natural condition of mankind before civil society: the war of every man against every man. Milton placed it at the center of Paradise Lost, where God declares enmity between Satan and humankind in Book X. John Adams and Thomas Jefferson, once close friends, entered a period of enmity after 1797 that lasted until their famous late correspondence began in 1812. In contemporary English, the word has retreated from everyday speech into formal, legal, and literary registers, but its structure remains unchanged: the direct negation of friendship.