Толковый словарь английского языка Oxford English Reference - jaw

n. & v. --n. 1 a each of the upper and lower bony structures in vertebrates forming the framework of the mouth and containing the teeth. b the parts of certain invertebrates used for the ingestion of food. 2 a (in pl.) the mouth with its bones and teeth. b the narrow mouth of a valley, channel, etc. c the gripping parts of a tool or machine. d gripping-power (jaws of death). 3 colloq. a talkativeness; tedious talk (hold your jaw). b a sermonizing talk; a lecture. --v. colloq. 1 intr. speak esp. at tedious length. 2 tr. a persuade by talking. b admonish or lecture. Phrases and idioms jaw-breaker colloq. a word that is very long or hard to pronounce. Etymology: ME f. OF joe cheek, jaw, of uncert. orig.