grynna

(-ti, -t), v. impers. to become shallower; grynnir dalinn, the dale became less deep;

refl., grynnast = grynna (þá er grynntist yfir at landinu).

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t, [grunnr], impers. to become shallow; grynnir dalinn (acc.), the dale became shallow, less deep, in advancing higher up in a dale, Bárð. 173: reflex., id., Bs. i. 355; þá er grynntisk yfir at landinu, Fms. viii. 170: metaph., kostr okkarr grynnisk, Bs. ii. 133: in mod. usage freq. act. and absol., það grynnir, fer að grynna.