disability
the condition of being unable to perform as a consequence of physical or mental unfitness
handicap
the condition of being unable to perform as a consequence of physical or mental unfitness
impairment
a symptom of reduced quality or strength
slow
not moving quickly; taking a comparatively long time
abnormal
not normal; not typical or usual or regular or conforming to a norm
challenge
a call to engage in a contest or fight
retarded
relatively slow in mental or emotional or physical development
dysfunctional
impaired in function; especially of a bodily system or organ
different
unlike in nature or quality or form or degree
limited
subject to limits or subjected to limits
dependent
a person who relies on another person for support (especially financial support)
special
having a specific function or scope