burr
1 = bur.
burr / bɜ:(r); bə/ n (usu sing 通常作单数)
1 whirring or humming sound made eg by parts of a machine turning quickly or by a telephone 隆隆声（如机器部件快速运转时发出的）; 嗡嗡声（如电话机的声音）.
2 strong pronunciation of the `r' sound, typical of certain English accents; accent using this 浓重的r音（为英语某些方音）; 带有浓重的r音的口音
speak with a soft West Country burr 用柔和的英国西南部地区的腔调说话. burr, v [I]
make a burr 发浓重的r音.