"weakly" in the adjective sense
1. decrepit, debile, feeble, infirm, rickety, sapless, weak, weakly
lacking bodily or muscular strength or vitality
"a feeble old woman"
"her body looked sapless"
"weakly" in the adverb sense
1. weakly
in a weak or feeble manner or to a minor degree
"weakly agreed to a compromise"
"wheezed weakly"
"he was weakly attracted to her"
Source: WordNet® (An amazing lexical database of English)
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