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adamant (n.)[adamant 词源字典]: mid-14c., from Old French adamant and directly from Latin adamantem (nominative adamas) "adamant, hardest iron, steel," also figuratively, of character, from Greek adamas (genitive adamantos) "unbreakable, inflexible" metaphoric of anything unalterable, also the name of a hypothetical hardest material, perhaps literally "invincible," from a- "not" + daman "to conquer, to tame" (see tame (adj.)), or else a word of foreign origin altered to conform to Greek.

Applied in antiquity to a metal resembling gold (Plato), white sapphire, magnet (by Ovid, perhaps via confusion with Latin adamare "to love passionately"), steel, emery stone, and especially diamond (see diamond). "The name has thus always been of indefinite and fluctuating sense" [Century Dictionary]. The word was in Old English as aðamans "a very hard stone."[adamant etymology, adamant origin, 英语词源]
compassionate (adj.): 1580s, from compassion + -ate (1). Related: Compassionately. Phrase compassionate conservatism in American political language recorded by 1992, popularized, if not coined, by Marvin Olasky, University of Texas at Austin instructor.
dispassionate (adj.): 1590s, from dis- "the opposite of" (see dis-) + passionate. Related: Dispassionately.
Eros (n.): god of love, late 14c., from Greek eros (plural erotes), "god or personification of love," literally "love," from eran "to love," erasthai "to love, desire," which is of uncertain origin.

Freudian sense of "urge to self-preservation and sexual pleasure" is from 1922. Ancient Greek distinguished four ways of love: erao "to be in love with, to desire passionately or sexually;" phileo "have affection for;" agapao "have regard for, be contented with;" and stergo, used especially of the love of parents and children or a ruler and his subjects.
impassionate (adj.): "free from passion," 1620s, from in- (1) "not" + passionate. Related: Impassionately.
madly (adv.): early 13c., from mad (adj.) + -ly (2). Colloquial meaning "passionately" had emerged by 18c.
paramour (n.): c. 1300, noun use of adverbial phrase par amour (c. 1300) "passionately, with strong love or desire," from Anglo-French and Old French par amour, from accusative of amor "love," from amare "to love" (see Amy). Originally a term for Christ (by women) or the Virgin Mary (by men), it came to mean "darling, sweetheart" (mid-14c.) and "mistress, concubine, clandestine lover" (late 14c.).
passionate (adj.): early 15c., "angry; emotional," from Medieval Latin passionatus "affected with passion," from Latin passio (genitive passionis) "passion" (see passion). Specific sense of "amorous" is attested from 1580s. Related: Passionately.
rage (v.): mid-13c., "to play, romp," from rage (n.). Meanings "be furious; speak passionately; go mad" first recorded c. 1300. Of things from 1530s. Related: Raged; raging.
bibliolater: "A person who is passionately enthusiastic about books", Mid 19th century: from biblio- + -later.