double-stop

v [I, Tn] (music 音) play (two stopped notes) at the same time on a violin, etc （拉小提琴等时）奏双音.

double transitive verb, double up, double-barrelled, double-bass, double-book, double-booking, double-breasted, double-check, double-cross, double-dealer, double-dealing, double-decker, double-dyed, double-edged, double-faced, double-glaze, double-glazing, double-jointed, double-park, double-quick, double-talk, double-think, doublet, doubly, doubt, doubter, doubtful, doubtfully, doubting Thomas, doubtless, douche, dough, doughnut, doughty, doughy, dour, dourly, douse, douse (also dowse), dove,