лапкаҥа•ш (-ам)
{verb I} [Generate paradigm] 1. to fall down, to slope, to become lower
♢ эҥе•р сер умба•кыже изиша•к лапкаҥе•ш {sentence} the shore of the river becomes lower a bit further on
2. {figuratively} to get worse, to fall, to diminish (one's mood)
♢ во•зымо ку•мылжо ок лапка•ҥ {sentence} his/her desire to write is not diminishing
--"PARENT"--> лапка• [1]