unguentum

Latin unguentum meant ointment or salve, from unguere, 'to anoint or smear.' The Romans were obsessive about unguents. Pliny the Elder lists dozens of preparations in his Natural History: rose oil for headaches, myrtle oil for ulcers, spikenard for inflammation. Roman baths had dedicated rooms — unctuaria — where slaves applied unguents to the skin after bathing. The practice was hygiene, medicine, and luxury at once.

The word carried religious weight. Anointing with oil was a sacred act across the ancient Mediterranean. Hebrew meshiach (messiah) means 'the anointed one.' Greek christós (Christ) means the same thing. The unguent was the medium through which divine selection was physically applied. Kings, priests, and the sick were all anointed — different purposes, same substance, same gesture.

English borrowed unguentum in the 1400s, shortening it to unguent. The word remained in medical and pharmaceutical use as a formal term for oil-based topical preparations. When pharmacists distinguish between creams, ointments, and unguents, they mean something specific: an unguent is the fattiest, greasiest preparation, with the least water content.

The word sounds archaic now — most people say ointment or cream or simply lotion. But unguent persists in pharmaceutical literature and in the language of ritual. When a Catholic priest administers last rites, the oil used is technically an unguent. The Latin is still performing its original function, connecting healing of the body to healing of the soul.