'Expert' in the Bible

They all handle the sword, and are expert in war: Every man hath his sword upon his thigh, Because of fear in the night.

the captain of fifty, and the honorable man, and the counsellor, and the expert artificer, and the skilful enchanter.

For, lo, I will stir up and cause to come up against Babylon a company of great nations from the north country; and they shall set themselves in array against her; from thence she shall be taken: their arrows shall be as of an expert mighty man; none shall return in vain.