Толковый словарь английского языка - clack

I. verb Etymology: Middle English, of imitative origin Date: 13th century intransitive verb chatter, prattle, to make an abrupt striking sound or series of sounds, cackle, cluck, transitive verb to cause to make a clatter, to produce with a chattering sound, ~er noun II. noun Date: 15th century 1. rapid continuous talk ; chatter, tongue, an object (as a valve) that produces clapping or rattling noises usually in regular rapid sequence, a sound of ~ing