að, to grow faint, weak; ef hann of förlar, if he fails, (the passage is dubious, and something seems left out), K. Þ. K. 42: reflex. to fall into ruin, ef förlask reiðir, svá at um bæta þarf, Gþl. 77; þá mun brátt f. afl ráða-görðar, Sks. 331:—impers., e-m förlask, one grows weak, esp. from age, Krók. 40; in mod. usage, finn eg að augum förlast sýn, I feel my eyes grow dim, Hallgr.