BT Yev 65b(8) :איתה דלא אפיל‏ :
See the entire entry for npl vb. to fall; befall

BT Yev 65b(8) :דאם איתה דלא אפיל נפשה בניפלי לא מחזקה‏ : for if it is the case that she did not miscarry, she would not have allowed herself to be presumed (a producer of) stillbirths
See the entire entry for nɘp̄el, nep̄lā n.m. fall