1. 8 The barking dogs quietened when they recognized me.

2. David has mellowed and quietened down a great deal.

3. Queen Mary finally quietened Margaret Rose by giving her a pair of opera glasses to peek through.

4. Synonyms for Buttoned up include shut up, stopped talking, kept quiet, kept mum, said nothing, put a sock in it, quietened down, piped down, hushed and belted up