narcissusyoudaoicibaDictYouDict
narcissus: [16] The plant-name narcissus goes back via Latin to Greek narkissos. Writers of ancient times such as Pliny and Plutarch connected it with Greek nárkē ‘numbness’ (source of English narcotic), a tempting inference given the plant’s sedative effect, but in fact it probably came from an unknown pre- Greek Aegean language. In Greek mythology the name passed to a vain youth who was punished by the gods for spurning the love of Echo.

They made him fall in love with the reflection of his beautiful features in a pool. He died gazing at his own image and was changed into a narcissus plant. In the 19th century his story inspired the word narcissism. At first it was just a general term for excessive self-admiration and self-centredness, but in the 1890s (probably at the hands of the sexologist Havelock Ellis) it became a technical term for a specific personality disorder marked by those traits.
enamor (v.)youdaoicibaDictYouDict
c. 1300, from Old French enamorer "to fall in love with; to inspire love" (12c., Modern French enamourer), from en- "in, into" (see en- (1)) + amor "love," from amare "to love" (see Amy). Since earliest appearance in English, it has been used chiefly in the past participle (enamored) and with of or with. An equivalent formation to Provençal, Spanish, Portuguese enamorar, Italian innamorare.
fall (v.)youdaoicibaDictYouDict
Old English feallan (class VII strong verb; past tense feoll, past participle feallen) "to drop from a height; fail, decay, die," from Proto-Germanic *fallan (cognates: Old Frisian falla, Old Saxon fallan, Dutch vallen, Old Norse falla, Old High German fallan, German fallen, absent in Gothic).

These are from PIE root *pol- "to fall" (cognates: Armenian p'ul "downfall," Lithuanian puola "to fall," Old Prussian aupallai "finds," literally "falls upon").

Meaning "come suddenly to the ground" is from late Old English. Of darkness, night, from c. 1600; of land sloping from 1570s; of prices from 1570s. Of empires, governments, etc., from c. 1200. Of the face or countenance from late 14c. Meaning "to be reduced" (as temperature) is from 1650s. Meaning "die in battle" is from 1570s. Meaning "to pass casually (into some condition)" is from early 13c.

To fall in "take place or position" is from 1751. To fall in love is attested from 1520s; to fall asleep is late 14c. To fall down is early 13c. (a-dun follon); to fall behind is from 1856. Fall through "fail, come to nothing" is from 1781. To fall for something is from 1903.

To fall out is by mid-13c. in a literal sense; military use is from 1832. Meaning "have a disagreement, begin to quarrel" is attested from 1560s (to fall out with "quarrel with" is from late 15c.).
inamorata (n.)youdaoicibaDictYouDict
"female lover," 1650s, from Italian innamorata, fem. of innamorato, past participle of innamorare "to fall in love," from in "in" (from Latin, see in) + amore "love" (see Amy).
love (n.)youdaoicibaDictYouDict
Old English lufu "love, affection, friendliness," from Proto-Germanic *lubo (cognates: Old High German liubi "joy," German Liebe "love;" Old Norse, Old Frisian, Dutch lof; German Lob "praise;" Old Saxon liof, Old Frisian liaf, Dutch lief, Old High German liob, German lieb, Gothic liufs "dear, beloved").

The Germanic words are from PIE *leubh- "to care, desire, love" (cognates: Latin lubet, later libet "pleases;" Sanskrit lubhyati "desires;" Old Church Slavonic l'ubu "dear, beloved;" Lithuanian liaupse "song of praise").
"Even now," she thought, "almost no one remembers Esteban and Pepita but myself. Camilla alone remembers her Uncle Pio and her son; this woman, her mother. But soon we shall die and all memory of those five will have left the earth, and we ourselves shall be loved for a while and forgotten. But the love will have been enough; all those impulses of love return the love that made them. Even memory is not necessary for love. There is a land of the living and a land of the dead and the bridge is love, the only survival, the only meaning." [Thornton Wilder, "Bridge of San Luis Rey," 1927]
Meaning "a beloved person" is from early 13c. The sense "no score" (in tennis, etc.) is 1742, from the notion of "playing for love," i.e. "for nothing" (1670s). Phrase for love or money "for anything" is attested from 1580s. Love seat is from 1904. Love-letter is attested from mid-13c.; love-song from early 14c. To fall in love is attested from early 15c. To be in love with (someone) is from c. 1500. To make love is from 1570s in the sense "pay amorous attention to;" as a euphemism for "have sex," it is attested from c. 1950. Love life "one's collective amorous activities" is from 1919, originally a term in psychological jargon. Love affair is from 1590s. The phrase no love lost (between two people) is ambiguous and was used 17c. in reference to two who love each other well (c. 1640) as well as two who have no love for each other (1620s).