פּירוש אויף ישעיהו 5:29

He has a roar like a lion His fear will be upon you like a lion.

וינהום And he shall roar. Irregular form; because regularly the guttural letter widens the vowel, and causes the form of the future to be like ⁴³Instead of יִפְעוֹל. See Zahoth, on the Kal.,יִפְעַל the second radical of the verb פעל being a guttural; in the conjugation tables, however, no notice is taken of this property, else we should not have in the paradigm the standard form of the future ויפליט

and he will retrieve He will save it from all those who try to save it. יַפְלִיט is esmoucer in O.F. [to seize].