thrum

:  the monotonous sound of thrumming

1a (1) :  a fringe of warp threads left on the loom after the cloth has been removed (2) :  one of these warp threadsb :  a tuft or short piece of rope yarn used in thrumming canvas —usually used in pluralc :  bit, particle

2 :  a hair, fiber, or threadlike leaf on a plant; also :  a tuft or fringe of such structures

1 :  to furnish with thrums :  fringe

2 :  to insert short pieces of rope yarn or spun yarn in (a piece of canvas) to make a rough surface or a mat which can be wrapped about rigging to prevent chafing

:  to play a stringed instrument idly :  strum