flaccid (adj.)

• anemic
• asthenic
• bloodless
• chicken
• cowardly
• debilitated
• drooping
• droopy
• dull
• effete
• emasculated
• etiolated
• faint
• feeble
• flabby
• flimsy
• floppy
• gone
• gutless
• imbecile
• impotent
• languid
• languorous
• lax
• limber
• limp
• listless
• loose
• nerveless
• powerless
• relaxed
• rubbery
• sapless
• slack
• sleazy
• soft
• spineless
• unhardened
• unnerved
• unstrung
• weak
• weakened
• weakly