tuó​gǔ

alligator-skin drum

鼍鼓 鼉鼓 tuó​gǔ
alligator-skin drum
(literary) A drum covered with the skin of an alligator or lizard, known for its deep sound; used in ancient times for music and ritual
to beat the night watch
(literary) To signal the night watches by beating drums
bellowing of an alligator
(literary) The bellowing sound made by an alligator
booming sound
(metaphorical) A loud booming sound, such as heavy snoring