弁解
benkai
excuse; explanation (for one's actions); justification

弁 ben has to do with "speech"
解 kai has to do with "solving" or "explanation"

弁護士 ben go shi - lawyer [I]
弁当 ben to - lunch box, boxed lunch [B]
解説 kai setsu - explanation, commentary [A]
理解 ri kai - understanding [I]