weakly

adjectives

lacking bodily or muscular strength or vitality
"a feeble old woman"; "her body looked sapless"
debile, decrepit, feeble, infirm, rickety, sapless, weak, weakly

adverbs

in a weak or feeble manner or to a minor degree
"weakly agreed to a compromise"; "wheezed weakly"; "he was weakly attracted to her"
weakly
antonym
strongly
is derived from
weak