fem. proper name, from Old French Amee, literally "beloved," from fem. past participle of amer "to love," from Latin amare "to love, be in love with; find pleasure in," Proto-Italic *ama- "to take, hold," from a PIE root meaning "take hold of," also the source of Sanskrit amisi, amanti "take hold of; swear;" Avestan *ama- "attacking power;" Greek omnymi "to swear," anomotos "under oath;" Old Irish namae "enemy." According to de Vaan, "The Latin meaning has developed from 'to take the hand of' [to] 'regard as a friend'."
word-forming element making adjectives from verbs, meaning "pertaining to, tending to; doing, serving to do," in some cases from Old French -if, but usually directly from Latin adjectival suffix -ivus (source also of Italian and Spanish -ivo). In some words borrowed from French at an early date it has been reduced to -y (as in hasty, tardy).
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Harper, D. (n.d.). Etymology of amative. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/amative