רָפַט to flap, be loose, lax.
Pi. - רִפֵּט to widen, make lax.—Part. pass. מְרוּפָּט. Sabb. 141ᵇ לא … במנעל מר׳ וכ׳ a woman must not go out (on the Sabbath) with a flappy (outworn) shoe, nor can it be used for ḥălitsah. Yeb. 102ᵇ מנעל המר׳ Ar. (ed. הנפרם).
Hithpa. - הִתְרַפֵּט to become lax. Sabb. 152ᵃ (ref. to II Sam. XIX, 36) מכאן ששפתותיהן … מִתְרַפְּטוֹת from this we learn that the lips of the old become lax (cannot be smacked, do not enjoy a taste); Yalk. Sam. 151.