feeble

weak, feeble, frail, fragile

这些形容词均有“虚弱的，乏力的”之意。
weak: 普通用词，指缺乏应有的力量，可用于身体、意志或精神。
feeble: 指身体衰弱无力，精力几乎耗尽，含令人怜悯的意味。
frail: 多指因经常生病而身体纤弱。
fragile: 可与frail换用，但语气强，侧重脆弱，指人容易生病，指物容易破碎。

形容词 feeble:

1. pathetically lacking in force or effectiveness
   同义词：lame
2. lacking strength or vigor
   同义词：faint
3. lacking physical strength or vitality
   同义词：decrepit, debile, infirm, rickety, sapless, weak, weakly
4. lacking strength- Nathaniel Hawthorne
   同义词：nerveless

1. His feeble excuses soon tailed off (into silence).
   他的藉口站不住脚，很快就没词儿了(不作声了).
2. This was his fatal defect; he was of feeble will.
   这是他致命的弱点，他意志薄弱。
3. Having a feeble or unsteady gait; shaky.
   不稳的，虚弱的; 摇晃的
4. He bleated out a feeble excuse.
   他以微弱的声音作无力的辩解。
5. A sick person is often feeble.
   病人常常虚弱无力。
6. A feeble attempt is liable to fail.
   愚蠢的尝试多半是要失败的。