stipple (v.)youdaoicibaDictYouDict[stipple 词源字典]
"paint with dots," 1670s, from Dutch stippelen "to make points," frequentative of stippen "to prick, speckle," from stip "a point," perhaps ultimately from PIE root *st(e)ig- "pointed" (see stick (v.)), or from *steip- "to stick, compress." Related: Stippled; stippling.[stipple etymology, stipple origin, 英语词源]