The Collaborative International Dictionary of English v.0.48:

Explicable \Ex"pli*ca*ble\, a. [L. explicabilis: cf. F.
   explicable.]
   Capable of being explicated; that may be explained or
   accounted for; admitting explanation.

   Syn: explainable. [1913 Webster]

              It is not explicable upon any grounds. --Burke.
        [1913 Webster]

WordNet (r) 3.0 (2006):

explicable
    adj 1: capable of being explicated or accounted for; "explicable
           behavior" [ant: incomprehensible, inexplicable]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "explicable":
   Englishable, accountable, alleged, answerable, ascertainable,
   ascribable, assignable, attributable, attributed,
   capable of solution, charged, construable, credited, decipherable,
   decodable, definable, derivable from, derivational, derivative,
   describable, determinable, doable, due, explainable, imputable,
   imputed, interpretable, open to solution, owing, putative,
   referable, referred to, renderable, resolvable, soluble, solvable,
   traceable, translatable, workable