strengthyoudaoicibaDictgodict[strength 词源字典]
strength: [OE] Strength is of course closely related to strong. It was formed in prehistoric Germanic (as *stranggithō) from the ancestor of modern English strong. The verb strengthen was coined from it in the 13th century.
=> string, strong[strength etymology, strength origin, 英语词源]
strength (n.)youdaoicibaDictgodict
Old English strengþu, strengð "bodily power, force, vigor, firmness, fortitude, manhood, violence, moral resistance," from Proto-Germanic *strangitho (cognates: Old High German strengida "strength"), from PIE *strenk- "tight, narrow" (see string (n.)), with Proto-Germanic abstract noun suffix *-itho (see -th (2)). Compare length/long. From the same root as strong,