chime in
chime in {v.}
1. {informal}
To join in.
The whole group chimed in on the chorus.
When the argument got hot, John chimed in.
2. To agree; go well together. — Usually used with "with".
Dick was happy, and the holiday music chimed in with his feelings.
When Father suggested going to the shore for the vacation, the whole family chimed in with the plan.
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Source: A Dictionary of American Idioms