поморщивать v stresses
gen.	knit brows slightly or from time to time
Gruzovik	knit one's brows slightly; knit one's brows from time to time
поморщиваться v
gen.	knit brows occasionally; knit brows slightly; make a wry face from time to time; wince
Gruzovik	knit one's brows slightly; knit one's brows occasionally; wince from time to time; make a wry face from time to time