frail
powerless
weak
abulic
afraid
aged
ailing
anemic
anile
asthenic
backward
barely audible
blear
bleared
bleary
bloodless
blurred
blurry
cachectic
chicken
confused
cowardly
crabbed
dark
debilitated
decrepit
decrescendo
delicate
dim
dim-witted
distant
dizzy
doddered
doddering
doddery
drained
drooping
droopy
dull
effete
emasculated
enervated
enfeeble
enfeebled
etiolated
exhausted
failing
faint
faint-voiced
fainthearted
faintish
foolish
helpless
slight
uncertain