Dispassionate vs. Unpassionate — Which is Correct Spelling?

Not influenced by strong emotion, and so able to be rational and impartial

Not influenced by strong feelings or emotions; impartial

Not showing, and not affected by, emotion, bias, or prejudice

Free from passion; not warped, prejudiced, swerved, or carried away by passion or feeling; judicial; calm; composed.

Not dictated by passion; not proceeding from temper or bias; impartial; as, dispassionate proceedings; a dispassionate view.

Unaffected by strong emotion or prejudice;