stampyoudaoicibaDictYouDict[stamp 词源字典]
stamp: [12] Stamp originally meant ‘crush into small pieces, pound’. The sense ‘slam the foot down’ did not emerge until the 14th century, and ‘imprint with a design by pressure’ (which forms the semantic basis of postage stamp [19]) is as recent as the 16th century. The word comes, probably via an unrecorded Old English *stampian, from prehistoric Germanic *stampōjan (source also of German stampfen, Dutch stampen, Swedish stampa, and Danish stampe).

This was derived from the noun *stampaz ‘pestle’, which was formed from the base *stamp- (a non-nasalized version of which, *stap-, lies behind English step). The Germanic verb was borrowed into Vulgar Latin as *stampīre, whose past participle has given English, via Mexican Spanish, stampede [19].
=> stampede, step[stamp etymology, stamp origin, 英语词源]
grind (v.)youdaoicibaDictYouDict
Old English grindan "to rub together, crush into powder, grate, scrape," forgrindan "destroy by crushing" (class III strong verb; past tense grand, past participle grunden), from Proto-Germanic *grindanan (cognates: Dutch grenden), related to ground, from PIE *ghrendh- "to grind" (cognates: Latin frendere "to gnash the teeth," Greek khondros "corn, grain," Lithuanian grendu "to scrape, scratch"). Meaning "to make smooth or sharp by friction" is from c. 1300. Most other Germanic languages use a verb cognate with Latin molere (compare Dutch malen, Old Norse mala, German mahlen).