weakly (adv.)
- barely
- daintily
- delicately
- dimly
- faintly
- feebly
- gently
- hardly
- imperfectly
- inconsequentially
- insignificantly
- languorously
- lightly
- listlessly
- little
- low
- meagerly
- minimally
- minutely
- pianissimo
- piano
- scantily
- scarcely
- shakily
- slightly
- soft
- softly
- unsteadily
weakly (adj.)
- anemic
- asthenic
- bloodless
- cachectic
- chicken
- cowardly
- debilitated
- decrepit
- drained
- drooping
- droopy
- dull
- effete
- enervated
- etiolated
- exhausted
- failing
- faint
- feeble
- flabby
- flaccid
- flimsy
- floppy
- fragile
- frail
- gone
- gutless
- imbecile
- impotent
- infirm
- insubstantial
- invalid
- languid
- languorous
- limber
- limp
- listless
- little
- low
- meagerly
- moribund
- nerveless
- pale
- peaked
- peaky
- pianissimo
- piano
- powerless
- reduced
- rubbery
- run-down
- sapless
- sickly
- slack
- soft
- spineless
- unhardened
- unhealthy
- unnerved
- unsound
- unstrung
- unsubstantial
- valetudinarian
- valetudinary
- weak
- weakened
