The Latin language has several different verbs corresponding to the English word 'love'.

Amare is the basic word for to love, as it still is in Italian today. The Romans used it both in an affectionate sense, as well as in a romantic or s*xual sense. From this verb come amans, a lover, amator, 'professional lover', often with the accessory notion of lechery, and amica, 'girlfriend' in the English sense, often as well being applied euphemistically to a prostitute. The corresponding noun is amor, which is also used in the plural form to indicate 'love affairs' or 's*xual adventures'. This same root also produces amicus, 'friend', and amicitia, 'friendship' (often based on mutual advantage, and corresponding sometimes more closely to 'indebtedness' or 'influence'). Cicero wrote a treatise called On Friendship (de Amicitia) which discusses the notion at some length. Ovid wrote a guide to dating called Ars Amatoria (The Art of Lovers), which addresses in depth everything from extramarital affairs to overprotective parents.

Complicating the picture somewhat, Latin sometimes uses amare where English would simply say to like; this notion, however, is much more generally expressed in Latin by placere or delectare, which are used more colloquially, and the latter of which is used frequently in the love poetry of Catullus.

Diligere often has the notion 'to be affectionate for', 'to esteem', and rarely if ever is used of romantic love. This word would be appropriate to describe the friendship of two men. The corresponding noun diligentia, however, has the meaning 'diligence' 'carefulness' and has little semantic overlap with the verb.

Observare is a synonym for 'diligere'; despite the cognate with English, this verb and its corresponding noun 'observantia' often denote 'esteem' or 'affection'.

Caritas is used in Latin translations of the Christian Bible to mean 'charitable love'. This meaning, however, is not found in Classical pagan Roman literature. As it arises from a conflation with a Greek word, there is no corresponding verb.