apprehensible

from WordNet (r) 3.0 (2006)

apprehensible
    adj 1: capable of being apprehended or understood [syn:
           {apprehensible}, {intelligible}, {graspable},
           {perceivable}, {understandable}]

from The Collaborative International Dictionary of English v.0.48

Apprehensible \Ap`pre*hen"si*ble\, a. [L. apprehensibilis. See
   {Apprehend}.]
   Capable of being apprehended or conceived. "Apprehensible by
   faith." --Bp. Hall. -- {Ap`*pre*hen"si*bly}, adv.
   [1913 Webster]