peri-youdaoicibaDictYouDict[peri- 词源字典]
word-forming element meaning "around, about, enclosing," from Greek peri (prep.) "around, about, beyond," cognate with Sanskrit pari "around, about, through," Latin per, from PIE *per- (1) "forward, through" (see per).[peri- etymology, peri- origin, 英语词源]