Etymology
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tender (v.)

"to offer formally," 1540s, from French tendre "to offer, hold forth" (11c.), from Latin tendere "to stretch, extend" (from PIE root *ten- "to stretch"). The retention of the ending of the French infinitive is unusual (see render (v.) for another example).

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ache (n.)
"continuing pain," early 15c., æche, ece "an ache, pain," from Old English æce, from Proto-Germanic *akiz, from same source as ache (v.), which see for the unusual evolution of spelling and pronunciation.
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favored (adj.)

1725, "enjoying unusual advantages," past-participle adjective from favor (v.). In compounds or phrases, "-featured, -looking," from c. 1400 (for example, well-favored "good-looking;" worst-favored "ugliest").

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offbeat (adj.)

also off-beat, "unusual," 1938, from off (adv.) + beat (n.). From earlier sense in reference to the second and fourth beats in a four-beat music rhythm (1927), where the stress typically fell on the first and third. Compare upbeat.

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infrequent (adj.)
1530s, "little used" (now obsolete); 1610s, "not occurring often," from Latin infrequentem (nominative infrequens) "occurring seldom, unusual; not crowded, absent," from in- "not" (see in- (1)) + frequens "repeated, regular, constant, often" (see frequent). Related: Infrequently.
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repine (v.)

"to manifest dissatisfaction, be fretfully discontented," mid-15c., repinen, probably from re-, here likely an intensive prefix, + pine (v.) "yearn," "but the formation is unusual" [OED]. Gray seems to have coined the transitive sense of "to long" for something (1742). Related: Repined; repining.

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bonhomie (n.)
"frank and simple good nature," 1803, from French bonhomie "good nature, easy temper," from bonhomme "good man" (with unusual loss of -m-), from bon "good" (see bon) + homme "man," from Latin homo "man" (see homunculus). The native equivalent is goodman. Bonhomme "member of an order of begging friars" is from 1620s.
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keepsake (n.)

"anything kept or given to be kept for the sake of the giver; a token of friendship," 1790, from keep (v.) + sake (n.1); an unusual formation on model of namesake; thus an object kept for the sake of the giver. The word was used c. 1830s in titles of popular holiday gift books containing beautiful engravings and mediocre poetry. As an adjective by 1839.

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specialty (n.)
c. 1300, "particular affection; special attachment or favor, partiality," from Old French especialte, more vernacular form of specialite (see speciality). Compare personalty/personality; realty/reality. From early 15c. as "unusual, or extraordinary thing; specialized branch of learning; peculiar quality, distinctive characteristic."
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spate (n.)
early 15c., originally Scottish and northern English, "a sudden flood, especially one caused by heavy rains or a snowmelt," of unknown origin. Perhaps from Old French espoit "flood," from Dutch spuiten "to flow, spout;" related to spout (v.). Figurative sense of "unusual quantity" is attested from 1610s.
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