riff

n short repeated pattern of notes in popular music （流行音乐中的）重复乐段.

ridden, riddle, ride, ride down, ride off, ride on, ride over, rider, ridge, ridge-pole, ridge-tile, ridgeway, ridicule, ridiculous, ridiculously, ridiculousness, riding, riding-crop, riding-school, rife, riff-raff, riffle, riffraff, rifle, rifle-range, rifleman, rifling, rift, rift valley, rig, rig-out, rigging, right, right angle, right away, Right Honourable, right of way, Right Reverend, right-handed, right-minded,