devolve (v.)youdaoicibaDictYouDict[devolve 词源字典]
early 15c., "to roll down," from Latin devolvere "to roll down," from de- (see de-) + volvere "to roll" (see volvox). Figurative sense of "to cause to pass down" is from 1520s. Related: Devolved; devolving. Also in same sense was devolute (1530s), from Latin devolutus, past participle of devolvere.[devolve etymology, devolve origin, 英语词源]
trundle (n.)youdaoicibaDictYouDict
"small wheel to support heavy weights," 1540s (implied in trundle bed "low bed on small wheels"), possibly from Middle English trendle "wheel, suspended hoop" (early 14c.), from Old English trendel "ring, disk" (see trend (v.)). Also probably in part from Old French trondeler "to roll down, fall down," which is of Germanic origin.