(thrummed, thrumming)no obj.
1- make a continuous rhythmic humming sound低沉地嗡嗡作响：
the boat's huge engines thrummed in his ears.
船上的巨型发动机在他的耳边嗡嗡作响。
1.1
- with obj. strum (the strings of a musical instrument) in a rhythmic way有节奏地拨弄（弦）。
usu. in sing.
- a continuous rhythmic humming sound有节奏的响声：
the steady thrum of rain on the windows.
雨点不断打在窗户上的滴滴答答声。
词源
late 16th cent. (as a verb)： imitative.
1
- (in weaving) an unwoven end of a warp thread, or a fringe of such ends, left in the loom when the finished cloth is cut away（纺织）纱头, 线头。
1.1
- any short loose thread了机回丝; 接头纱。
派生词
thrummer
nounthrummy
adjective词源
Old English thrum （only in tungethrum 'ligament of the tongue'）： of Germanic origin; related to Dutch dreum 'thrum' and German Trumm 'end piece'. The current sense dates from Middle English.