One who, or that which, quietens.

plural of quietener

The act of making something quieter.

present participle of quieten

Third-person singular simple present indicative form of quieten

simple past tense and past participle of quieten

(transitive) To make quiet. / (intransitive) To become quiet.

plural of quietening

(intransitive, Britain) To become quieter. / (intransitive, Britain) To reduce intensity of an activity. / (transitive, Britain) To make someone or something become quieter.

Third-person singular simple present indicative form of quieten down