love apple (n.)youdaoicibaDictYouDict[love apple 词源字典]
"tomato," 1570s, corresponding to French pomme d'amour, German liebesapfel, but the reason for the term remains obscure. One guess is that it is a corruption of Italian pomo de'Mori or Spanish pome dei Moro, literally "Moorish apple."[love apple etymology, love apple origin, 英语词源]
love bird (n.)youdaoicibaDictYouDict
1590s, small species of West African parrot, noted for the remarkable attention mating pairs pay to one another; figurative sense of "a lover" is attested from 1911.
Hold hands, you lovebirds. [Emil Sitka]
love child (n.)youdaoicibaDictYouDict
"child born out of wedlock," 1805, from love (n.) + child. Earlier was love brat (17c.).
loveless (adj.)youdaoicibaDictYouDict
early 14c., "feeling no love;" late 14c. "unloved," from from love (n.) + -less. Attested from mid-13c. as a surname. Related: Lovelessly; lovelessness.
lovelily (adv.)youdaoicibaDictYouDict
early 14c., from lovely + -ly (2).
loveliness (n.)youdaoicibaDictYouDict
mid-14c., "lovableness," from lovely + -ness.
lovelonging (n.)youdaoicibaDictYouDict
c. 1300, luue langing, from love (n.) + infinitive of long (v.).
lovelorn (adj.)youdaoicibaDictYouDict
also love-lorn, "pining for love," 1630s, from love (n.) + lorn. Perhaps coined by Milton.
lovely (adj.)youdaoicibaDictYouDict
Old English luflic "affectionate, loveable;" see love (n.) + -ly (1). The modern sense of "lovable on account of beauty, attractive" is from c. 1300, "applied indiscriminately to all pleasing material objects, from a piece of plum-cake to a Gothic cathedral" [George P. Marsh, "The Origin and History of the English Language," 1862].
lovemaking (n.)youdaoicibaDictYouDict
"courtship," mid-15c., from love (n.) + make. Phrase make love is attested from 1570s in the sense "pay amorous attention to;" as a euphemism for "have sex," it is attested from c. 1950.
lover (n.)youdaoicibaDictYouDict
early 13c., agent noun from love (v.). Old English had lufend for male lovers, lufestre for women. Meaning "one who has a predilection for" (a thing, concept, pursuit, etc.) is mid-14c. As a form of address to a lover, from 1911. Related: Loverly.
lovesick (adj.)youdaoicibaDictYouDict
also love-sick, 1520s, from love (n.) + sick (adj.).
lovesome (adj.)youdaoicibaDictYouDict
Old English lufsum "worthy of love," from love (v.) + -some (1). Early 13c. as "lovely," 1720 as "amorous." An old word that might be useful in its original sense. Related: Lovesomely; lovesomeness.
lovestruck (adj.)youdaoicibaDictYouDict
also love-struck, by 1762, from love (n.) + struck (see strike (v.)). Love stricken is attested from 1805.
loveyyoudaoicibaDictYouDict
affectionate pet name, 1731, from love (n.) + -y (3). Extended form lovey-dovey attested from 1819 (n.), 1847 (adj.).
loving (adj.)youdaoicibaDictYouDict
Old English lufenda (see love (v.)). Loving cup is attested from 1808. Lovingkindness was Coverdale's word.
lovingly (adv.)youdaoicibaDictYouDict
late 14c., from loving + -ly (2).
low (adj.)youdaoicibaDictYouDict
"not high," late 13c., from lah (late 12c.), "not rising much, being near the base or ground" (of objects or persons); "lying on the ground or in a deep place" (late 13c.), from Old Norse lagr "low," or a similar Scandinavian source (compare Swedish låg, Danish lav), from Proto-Germanic *lega- "lying flat, low" (cognates: Old Frisian lech, Middle Dutch lage, Dutch laag "low," dialectal German läge "flat"), from PIE *legh- "to lie" (see lie (v.2)).

Meaning "humble in rank" is from c. 1200; "undignified" is from 1550s; sense of "dejected, dispirited" is attested from 1737; meaning "coarse, vulgar" is from 1759. In reference to sounds, "not loud," also "having a deep pitch," it is attested from c. 1300. Of prices, from c. 1400. In geographical usage, low refers to the part of a country near the sea-shore (c. 1300, as in Low Countries "Holland, Belgium, Luxemburg," 1540s). As an adverb c. 1200, from the adjective.
low (v.)youdaoicibaDictYouDict
Old English hlowan "make a noise like a cow," from Proto-Germanic *khlo- (cognates: Middle Dutch loeyen, Dutch loeien, Old Low Franconian luon, Old High German hluojen), from imitative PIE root *kele- (2) "to shout" (see claim (v.)).
low (n.1)youdaoicibaDictYouDict
sound made by cows, 1540s, from low (v.).