Late at night, the clicketty-clack of horse hooves on the cobblestones kept me awake.

She strode into the empty station, click-clacking down the platform with every step.

The engineer inspected the clack valves before restarting the steam pump.

The clack doors in the old mansion kept slamming shut with a sharp, rhythmic sound.

The workshop was full of old clack boxes that clicked and whirred whenever someone walked by.