BDB4979
נֶ֫גֶף noun masculine Exod 12:13 blow, striking (as judgment, only P ); — ׳ נ absolute Exod 12:13 + 6 t.; —
1. fatal blow, plague, Exod 12:13 (death of first-born); Exod 30:12; Num 8:19 (indefinite); = pestilence Num 17:11; Num 17:12; Josh 22:17.
2.
striking, ׳
אֶבֶן נ
Isa 8:14 i.e.
against which the foot strikes and so stumbles (|| צוּר מִכְשׁוֺל).