the- combining form ortheo- Etymology: Middle English theo-, from Late Latin, from Latin, god, from Greek the-, theo- god, God, from theos; perhaps akin to Middle High German getwās ghost, Lithuanian dvasia spirit, dvasas spirit, breath — more at dust 1. a.: God < theism > < theocentric > b.: god < theomancy > 2. a.: theological and < theoastrological > b.: theology and < theomythology >