apologise

from WordNet (r) 3.0 (2006)

apologise
    v 1: defend, explain, clear away, or make excuses for by
         reasoning; "rationalize the child's seemingly crazy
         behavior"; "he rationalized his lack of success" [syn:
         {apologize}, {apologise}, {excuse}, {justify},
         {rationalize}, {rationalise}]
    2: acknowledge faults or shortcomings or failing; "I apologized
       for being late"; "He apologized for the many typoes" [syn:
       {apologize}, {apologise}]

from The Collaborative International Dictionary of English v.0.48

apologise \apologise\ v.
   1. same as {apologize}.

   Syn: apologize, excuse, justify, rationalize
        [WordNet 1.5]