chime in
intransitive-verb
To make a remark or interrupt a conversation, often unsolicited or unexpected.
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I'll chime in if needed.
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During the meeting, he decided to chime in with a suggestion to improve the project.
To add one's voice or opinion to an ongoing discussion, typically to support or agree.
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Do you want to chime in?
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When they started talking about music, he had to chime in because he loves that topic.