clack
verbUK /klæk/
US /klæk/
To make a short, sharp sound by hitting two hard things together.
The wooden blocks clack together when you knock them.
OTHER MEANINGS
2. A short, sharp sound made by two hard things hitting.
I heard the clack of the train on the tracks.
3. To talk quickly and noisily.
The hens clacked in the yard all morning.
4. A tool that makes a clacking noise, like a wooden rattle.
The clown waved his clack to get the crowd's attention.