jawbreaker

noun

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.

noun

1. Also called: jawcrusher a device having hinged jaws for crushing rocks and ores
2. informal a word that is hard to pronounce