impel (v.)youdaoicibaDictYouDict[impel 词源字典]
early 15c., from Latin impellere "to push, strike against, drive forward, urge on," from assimilated form of in- "into, in, on, upon" (see in- (2)) + pellere "to push, drive" (see pulse (n.1)). Related: Impelled; impelling.[impel etymology, impel origin, 英语词源]