トウ 
こた.える こた.え 
() solution () answer
         
こたえ (n) response, reply, answer, solution
こたえ (n) response, reply, answer, solution
こたえる (v1,vi) to answer, to reply
とうあん (n) examination paper, examination script
とうしん (n,vs) report, reply, findings
とうべん (n,vs) response, reply, answer, defence, defense

Links: KanjiDic: EDict : Wikimedia
Etymologies: 中文字譜 : 説文解字