'Adequate' in the Bible

They returned and reported to Joshua, "Don't send the whole army. About two or three thousand men are adequate to defeat Ai. Don't tire out the whole army, for Ai is small."

Certainly a man cannot rescue his brother; he cannot pay God an adequate ransom price

to the latter an odor from death to death, but to the former a fragrance from life to life. And who is adequate for these things?

Not that we are adequate in ourselves to consider anything as if it were coming from ourselves, but our adequacy is from God,

who made us adequate to be servants of a new covenant not based on the letter but on the Spirit, for the letter kills, but the Spirit gives life.