We found one dictionary that defines the word make quieter:

Phrases: to make quieter, more... ▸ Words similar to make quieter ▸ Usage examples for make quieter ▸ Idioms related to make quieter ▸ Wikipedia articles (New!) ▸ Words that often appear near make quieter ▸ Rhymes of make quieter ▸ Invented words related to make quieter