[{"Bold_text": "noun", "List Items": ["Also a protruding, ragged edge raised on the surface of metal during drilling, shearing, punching, or engraving.", "a rough or irregular protuberance on any object, as on a tree.", "a small, handheld, power-driven milling cutter, used by machinists and die makers for deepening, widening, or undercutting small recesses.", "a lump of brick fused or warped in firing."]}, {"Bold_text": "verb (used with object)", "List Items": ["to form a rough point or edge on.", "deburr ."]}, {"Bold_text": "noun", "List Items": ["a washer at the head of a rivet.", "a blank out of a piece of sheet metal."]}, {"Bold_text": "noun", "List Items": ["a pronunciation of ther-sound as a uvular trill, as in certain Northern English dialects.", "a pronunciation of ther-sound as an alveolar flap or trill, as in Scottish English.", "any pronunciation popularly considered rough or nonurban.", "a whirring noise."]}, {"Bold_text": "verb (used without object)", "List Items": ["to speak with a burr.", "to speak roughly, indistinctly, or inarticulately.", "to make a whirring sound."]}, {"Bold_text": "verb (used with object)", "List Items": ["to pronounce (words, sounds, etc.) with a burr."]}, {"Bold_text": "noun", "List Items": ["burstone ."]}, {"Bold_text": "noun", "List Items": ["Aaron,1756–1836,vice president of the U.S. 1801–05."]}]