To Respond

1. (transitive, intransitive) To say something in return; to answer; to reply.
2. (intransitive) To act in return; to carry out an action or in return to a force or stimulus; to do something in response.
3. (transitive, intransitive) To correspond with; to suit.
4. (transitive) To satisfy; to answer.
5. (intransitive) To be liable for payment.