PunjabyoudaoicibaDictYouDict[Punjab 词源字典]
region on the Indian subcontinent, from Hindi Panjab, from Persian panj "five" (from PIE *penkwo-; see five) + ab "water," from Iranian *ap-, from PIE *ap- (2) "water" (see water (n.1)). So called for its five rivers. Related: Punjabi.[Punjab etymology, Punjab origin, 英语词源]