"Look!" or "Listen!" This word adds emphasis to what is said next. This is the Lord's message to Pharaoh. Alternate translation: "Pay attention to what I am about to tell you!"
Here "sword" is a metonym for battle, and "bring a sword against you" is a metaphor for causing an enemy army to come fight against Egypt. Alternate translation: "I will cause your enemies to come fight against you" (See: [[rc://en/ta/man/jit/figs-metonymy]])