See feeble in Webster's New World Roget's A-Z Thesaurus II
adjective
Not physically strong:
decrepit, delicate, flimsy, fragile, frail, infirm, insubstantial, puny, unsound, unsubstantial, weak, weakly. See strongSo lacking in strength as to be barely audible:
faint, weak. See strongHaving little substance or significance; not solidly based:
flimsy, insubstantial, tenuous, unsubstantial. See strong
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