call (v.)youdaoicibaDictYouDict[call 词源字典]
Old English ceallian "to call, shout," less common than clipian; replaced by related Old Norse kalla "to cry loudly," from Proto-Germanic *kall- (cognates: Dutch kallen "to talk," Old High German kallon "to call"), from PIE root *gal- (2) "to call, scream, shriek, shout" (cognates: Sanskrit garhati "bewail, criticize;" Latin gallus "cock;" Old High German klaga, German Klage "complaint, grievance, lament, accusation;" Old English clacu "affront;" Old Church Slavonic glasu "voice," glagolu "word;" Welsh galw "call"). Related: Called; calling.

Meaning "to give a name to" is mid-13c. Coin-toss sense is from 1801. Meaning "to visit" (Middle English) was literally "to stand at the door and call." Telephone/telegraph sense is from 1889. To call out someone to fight (1823) corresponds to French provoquer. To call it a day is from 1834.[call etymology, call origin, 英语词源]
cataract (n.)youdaoicibaDictYouDict
early 15c., "a waterfall, floodgate," from Latin cataracta "waterfall," from Greek katarhaktes "waterfall, broken water; a kind of portcullis," noun use of an adjective compound meaning "swooping, down-rushing," from kata "down" (see cata-). The second element is traced either to arhattein "to strike hard" (in which case the compound is kat-arrhattein), or to rhattein "to dash, break."

Its alternative sense in Latin of "portcullis" probably was passed through French to form the English meaning "eye disease" (early 15c.), on the notion of "obstruction" (to eyesight).