HP Sassoon(1) 15.8 :חולה דלא מצי מיכל מצה ביבישותיה‏ : "a sick person" who cannot eat unleavened bread in its dry state
See the entire entry for yabbīšū, yabbīšūṯā n.f. dryness

HP Sassoon(1) 15.8 :תרי ליה והאוי פתיתא‏ : he soaks it [i.e. the unleavened bread] and it becomes broken up
See the entire entry for ptt vb. to break off, tear away