BT Ara 19a(4) :סבא ב{כ}<ב>יתא פאחא בביתא‏ : an old man in the house is a snare in the house [i.e. of no use]
See the entire entry for paḥ, paḥḥā n.m. trap

BT Ara 19a(4) :פחחא בביתא‏ :
See the entire entry for pḥāḥ, pḥāḥā v.n. weakness