英语词源字典 - 在线词源网站

serrate (adj.)[serrate 词源字典]: "notched," 1660s, from Latin serratus "sawlike, notched like a saw," from serra "a saw," of unknown origin. Related: Serrated; serrating.[serrate etymology, serrate origin, 英语词源]
serrated (adj.): 1703, past participle adjective based on Latin serratus (see serrate (adj.)). Serrating "sawing" attested from 1590s, but serrate as a transitive verb not attested before 1750 according to OED.
serration (n.): "condition of being serrated," 1808, noun of state from serrate (adj.).