\ ˈklak
\
clacked;
clacking;
clacks
transitive verb
1
: to cause to make a clatter
2
: to produce with a chattering sound
specifically
: blab
1a
: rapid continuous talk : chatter
2
archaic
: an object (such as a valve) that produces clapping or rattling noises usually in regular rapid sequence
3
: a sound of clacking
the clack of a typewriter