noun / verb
clunk
KLUNK/klˈʌŋk/
A dull, heavy sound, or making or moving with such a sound.
The heavy wooden mallet hits the block with a dull clunk.

Etymology
Clunk was coined in imitation of a sound, originally that of a cork being pulled from a bottle. Its modern use describes a dull, heavy noise rather than that particular sound.
In context
Clang, clunk, crash. The noise frightened the big dogs away.
More examples
- A loud clunk comes from under the hood.
- The old elevator clunks to a stop.
- My boots clunk on the wooden stairs.
Forms
clunk · clunks · clunked · clunking