[adjective] pathetically lacking in force or effectiveness; "a feeble excuse"; "a lame argument" Synonyms:lame
[adjective] lacking strength or vigor; "damning with faint praise"; "faint resistance"; "feeble efforts"; "a feeble voice" Synonyms:faint
[adjective] lacking physical strength or vitality; "a feeble old woman"; "her body looked sapless" Synonyms:decrepit, debile, infirm, sapless, weak, weakly
[adjective] lacking strength; "a weak, nerveless fool, devoid of energy and promptitude"- Nathaniel Hawthorne Synonyms:nerveless