We found one dictionary that defines the word make a low continuous sound:

▸ Words similar to make a low continuous sound ▸ Usage examples for make a low continuous sound ▸ Idioms related to make a low continuous sound ▸ Wikipedia articles (New!) ▸ Words that often appear near make a low continuous sound ▸ Rhymes of make a low continuous sound ▸ Invented words related to make a low continuous sound