To chime in is to add your voice to a conversation already going. Chime in with a suggestion, everybody chime in.
It is friendlier than interrupting, since it joins rather than takes over. The picture is a bell coming in on the right beat with the others.
1phrasechime inTo add your voice to a conversation already going.
“Two others chime in whenever the subject comes up.”
chime in is a phrase.
Practised in Ways of Speaking