(こた)える

こたえる
verb (ichidan)
to answer, to respond
1. to answer, to reply
To give a response to a question or inquiry. The question or person being answered is marked with に.
Please answer the question.
質問に答える is a common collocation
(かれ)(なに)(こた)えなかった。
He didn't answer anything.
正直(しょうじき)(こた)えます。
I will answer honestly.
先生(せんせい)質問(しつもん)(こた)えられなかった。
I couldn't answer the teacher's question.
Potential form
The phone rang, but no one answered.

TRANSITIVITY: 自動詞(じどうし) (intransitive). No pair verb. Pattern: Xに(こた)える (answer X).

ASPECT: ている indicates ongoing action. (こた)えている = 'is answering.'

COMMON PATTERNS:

IMPORTANT: Takes に particle, not を. Compare: () takes for questions.