strongyoudaoicibaDictYouDict[strong 词源字典]
strong: [OE] Strong comes from a prehistoric Germanic *stranggaz (its immediate Germanic siblings have now died out, but German streng ‘severe’ is quite closely related). It went back ultimately to a base denoting ‘stiffness’ or ‘tautness’, which also produced English string.
=> string[strong etymology, strong origin, 英语词源]
cognate (adj.)youdaoicibaDictYouDict
1640s, from Latin cognatus "of common descent," from com- "together" (see co-) + gnatus, past participle of gnasci, older form of nasci "to be born" (see genus). Words that are cognates are cousins, not siblings. As a noun, from 1754.