Become quiet is a phrase that can be used to describe the act of calming down or becoming silent. The crossword solutions for this term are HUSH (4 letters), SHH (3 letters), PEACE (5 letters), HUSHUP (6 letters) and SETTLEDOWN (10 letters). HUSH is an interjection used to tell someone to be quiet, while SHH is a similar interjection but with a softer tone. PEACE is a word used to describe a state of tranquility and harmony. HUSHUP is a phrase used to tell someone to be quiet, and SETTLEDOWN is a phrase used to tell someone to calm down.