— jawbreaking , adj. — jawbreakingly , adv.
/jaw"bray'keuhr/ , n.
1. Informal. a word that is hard to pronounce.
2. a very hard, usually round, candy.
3. Also called jaw crusher . Mining. a machine used to break up ore, consisting of a fixed plate and a hinged jaw moved by a toggle joint.
[ 1830-40; JAW 1 + BREAKER 1 ]