encliticyoudaoicibaDictYouDict[enclitic 词源字典]
1650s (adj.); 1660s (n.), in grammar, from Late Latin encliticus, from Greek enklitikos "throwing its accent back," literally "leaning on," from verbal adjectival stem of enklinein "to bend, lean on," from en "in" (see en- (2)) + klinein "to lean" (see lean (v.)).[enclitic etymology, enclitic origin, 英语词源]
lean (v.)youdaoicibaDictYouDict
c. 1200, from Old English hleonian "to bend, recline, lie down, rest," from Proto-Germanic *khlinen (cognates: Old Saxon hlinon, Old Frisian lena, Middle Dutch lenen, Dutch leunen, Old High German hlinen, German lehnen "to lean"), from PIE root *klei- "to lean, to incline" (cognates: Sanskrit srayati "leans," sritah "leaning;" Old Persian cay "to lean;" Lithuanian slyti "to slope," slieti "to lean;" Latin clinare "to lean, bend," clivus "declivity," inclinare "cause to bend," declinare "bend down, turn aside;" Greek klinein "to cause to slope, slant, incline;" Old Irish cloin "crooked, wrong;" Middle Irish cle, Welsh cledd "left," literally "slanting;" Welsh go-gledd "north," literally "left" -- for similar sense evolution, see Yemen, Benjamin, southpaw).

Meaning "to incline the body against something for support" is mid-13c. Figurative sense of "to trust for support" is from early 13c. Sense of "to lean toward mentally, to favor" is from late 14c. Related: Leaned; leaning. Colloquial lean on "put pressure on" (someone) is first recorded 1960.
nictitate (v.)youdaoicibaDictYouDict
"to wink," 1822, from Medieval Latin nictitatus, past participle of nictitare, frequentative of Latin nictare "wink, blink," related to nicere "to beckon," from PIE root *kneigwh- "to lean on, to bend" (the eyelids together). Related: Nictitated; nictitating (1713). Earlier form was nictate (v.), 1690s, from Latin nictare.
scepter (n.)youdaoicibaDictYouDict
c. 1300, ceptre, from Old French sceptre (12c.), from Latin sceptrum "royal staff," from Greek skeptron "staff to lean on; royal scepter;" in transferred use, "royalty," from root of skeptein "to prop or stay, lean on." Apparently a cognate with Old English sceaft (see shaft (n.1)). The verb meaning "to furnish with a scepter" is from 1520s. Related: sceptred.