The word 'weakened' is built upon the Old English adjective wāc, which conveyed a sense of being pliant, yielding, or lacking strength. This root is part of a wider Germanic family. The addition of the verb-forming suffix '-en', also of Old English origin, transforms the adjective into the verb 'weaken', meaning "to make or become weak". Finally, the regular past tense and participial suffix '-ed' is appended, resulting in a word that describes the state of having been made less strong, either physically, in intensity, or in power. The semantic journey is direct, moving from a concrete description of physical pliancy to a broad concept of diminished force or vigor.

Structure: weak (not strong) + en (make or become) + ed (past/participle suffix) - weak: From Old English wāc (pliant, yielding, weak), of Germanic origin. Functions as the core adjective root. - en: A verb-forming suffix of Germanic origin, from Old English -nian, used to form verbs meaning "to make or become". - ed: A suffix of Germanic origin, from Old English -od, -ad, used to form the past tense and past participle of regular verbs.