feeble

adj

1.
pathetically lacking in force or effectiveness
lame
Derived from:
feebleness
2.
lacking strength or vigor
faint
Derived from:
feebleness
3.
lacking bodily or muscular strength or vitality
debile decrepit infirm rickety sapless weak weakly
Derived from:
feebleness
4.
lacking strength
nerveless
Derived from:
feebleness