切れ端: scrap, fragment

切れ目, 切目: break, pause, gap, end, rift

切れ味, 切味: sharpness of a sword, feel of a cutting edge

scrap of paper

one slice or cut of something / (rare) a one-time sexual liaison, a one-night stand

to run out of breath

be cut off, break, snap, burst, collapse / be cut, be injured, become fissured / break off, be interrupted / cut or sever connection with / run out, expire, terminate

sharpness, cutting quality / cloth / piece, bit, strip, slice / (informal, of movement) sharpness and briskness

sharpness, cutting quality / skill, sharpness of performance

fragmentary, intermittent