Thrum

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 461
thrum, n. One of the ends of weavers' threads; a tuft; any coarse yarn.— v. t. [thrummed (thrumd), -Ming.] To furnish with thrums; to insert tufts Thrum, thrum, v. i. To play rudely or monotonously on an instrument with the fingers. — v. t. [thrummed (thrumd), -ming.] To play (an instrument) in a rude or monotonous manner.
Readham'da tam maddeyi gor →