коштыргаш (-ем)
{verb II} [Generate paradigm] 1. to roughen, to become coarse, to become weather-beaten
♢ чурием коштырген {sentence} my face became weather-beaten
♢ кидем коштырга {sentence} my hands are getting rough
♢ лум коштырген {sentence} the snow roughened
♦ мардеж дене коштыргаш (-ем) {verb II} to become rough in the wind
~ ASPECTUAL CONVERB CONSTRUCTIONS ~
// коштырген пыташ (-ем) {verb II} {perfective} (see above)
♢ кидем коштырген пыта {sentence} my hands are becoming completely rough
--"PARENT"--> коштыра