to be quiet (due to lack of activity); to be in a slump (of a business)
(for one's stomach) to rumble
to croak (e.g. like a frog)
to be quiet (due to lack of activity); to be in a slump (of a business)
to be quiet (due to lack of activity); to be in a slump (of a business)
cry of earthworms (heard on autumn nights and rainy days)