rodent
n.
1835 (as an adjective 1833), from Modern Latin Rodentia, the order name, from Latin rodentem (nominative rodens), present participle of rodere "to gnaw, eat away," from PIE root *red- "to scrape, scratch, gnaw" (cognates: Sanskrit radati "scrapes, gnaws," radanah "tooth;" Latin radere "to scrape;" Welsh rhathu "scrape, polish"). Uncertain connection to Old English rætt (see rat, n.).
〔李〕[rod;-enta.] a.咬的； 啮齿的； 侵蚀性的 n.啮齿动物 ←rod,ros (L rodere,rosum)=to gnaw or bite 蚀，咬
〔蒋〕[rod咬，-ent名词及形容词后缀] 咬的，嚼的;啮齿动物(如鼠等)