kindergartener (n.)youdaoicibaDictYouDict[kindergartener 词源字典]
"kindergarten teacher," 1872, from kindergarten + -er (1). The German form kindergartner is recorded in American English from 1863. As "kindergarten pupil," attested from 1935.[kindergartener etymology, kindergartener origin, 英语词源]
kindle (v.)youdaoicibaDictYouDict
c. 1200, cundel, "to set fire to, to start on fire," probably from a Scandinavian source akin to Old Norse kynda "to kindle, to light a fire," Swedish quindla "kindle," of uncertain origin, + frequentative suffix -le. Figurative use from c. 1300. Intransitive sense "to begin to burn, to catch fire" is from c. 1400. Related: Kindled; kindling.

Influenced in form, and sometimes in Middle English in sense, with kindel "to give birth" (of animals), "bring forth, produce" (c. 1200), from kindel (n.) "offspring of an animal, young one," from Old English gecynd (see kind (n.)) + -el.
kindling (n.)youdaoicibaDictYouDict
"material for lighting fire," 1510s, from present participle of kindle (v.). Earlier "a setting alight" (c. 1300).
kindly (adj.)youdaoicibaDictYouDict
early 14c., from Old English gecyndelic "natural, innate; suitable, lawful;" see kind (adj.) + -ly (1). Related: Kindliness.
kindly (adv.)youdaoicibaDictYouDict
"with kind feelings," Old English gecyndelice; see kind (adj.) -ly (2).
kindness (n.)youdaoicibaDictYouDict
c. 1300, "courtesy, noble deeds," from kind (adj.) + -ness. Meaning "kind deeds; kind feelings" is from late 14c. Old English kyndnes meant "nation; produce, an increase."
kindred (n.)youdaoicibaDictYouDict
c. 1200, kinraden, compound of kin (q.v.) + -rede, from Old English ræden "condition, rule," related to rædan "to advise, rule" (see read (v.)). With intrusive -d- (17c.) probably for phonetic reasons (compare thunder) but perhaps encouraged by kind (n.). As an adjective, 1520s, from the noun.
kine (n.)youdaoicibaDictYouDict
archaic plural of cow, a double plural (compare children) or genitive plural of Middle English kye "cows," from Old English cy (genitive cyna), plural of cu "cow."
kinemayoudaoicibaDictYouDict
see cinema.
kinematics (n.)youdaoicibaDictYouDict
"science of motion," 1840, from French cinématique (Ampère, 1834), from Greek kinesis "movement, motion" (see cite). Related: Kinematic (1864); kinematical.
kinesics (n.)youdaoicibaDictYouDict
study of body language, 1952, from Greek kinesis "movement, motion" (see cite) + -ics. Related: kinesic.
kinesiology (n.)youdaoicibaDictYouDict
1894, from kinesi-, comb. form of Greek kinesis "movement, motion" (see cite) + -ology. Related: Kinesiological; kinesiologically.
kinesis (n.)youdaoicibaDictYouDict
"physical movement," 1819, from Greek kinesis "movement, motion" (see cite).
kinesthesia (n.)youdaoicibaDictYouDict
also kinaesthesia, 1888, Modern Latin compound of Greek kinein "to set in motion; to move" (see cite) + aisthesis "perception" (see anaesthesia).
kinesthetic (adj.)youdaoicibaDictYouDict
also kinaesthetic, "pertaining to kinesthesia," 1880, coined by British neurologist Henry Charlton Bastian (1837-1915) from Greek kinein "to move" (see cite) + aisthesis "sensation" (see anaesthesia). Perhaps on model of aesthetic, prosthetic.
kinesthetics (n.)youdaoicibaDictYouDict
also kinaesthetics, by 1893, from kinesthetic "pertaining to kinesthesia" + -ics.
kinetic (adj.)youdaoicibaDictYouDict
"relating to motion," 1841, from Greek kinetikos "moving, putting in motion," from kinetos "moved," verbal adjective of kinein "to move" (see cite).
Buster Keaton's subject was kinetic man, a being he approached with the almost metaphysical awe we reserve for a Doppelgänger. This being was, eerily, himself, played by himself, then later in a projection room, watched by himself: an experience never possible to any generation of actors in the previous history of the world. [Hugh Kenner, "The Counterfeiters," 1968]
Related: Kinetical; kinetically.
kinetics (n.)youdaoicibaDictYouDict
1864, from kinetic; see -ics.
kineto-youdaoicibaDictYouDict
word-forming element meaning "motion," from Greek kineto-, comb. form of kinetos (see kinetic).
kinfolk (n.)youdaoicibaDictYouDict
also kin-folk, 1802, principally American English, but the earliest references are British, from kin (n.) + folk (n.). Kinsfolk is recorded from 1844.