Take... in vain. — Literally, Thou shalt not put the name of Jehovah thy God to vanity: i.e., to anything that is false, or hollow, or unreal. Primarily, it is false swearing that is forbidden here; but the extension of the principle to vain and rash swearing, or the light use of the Name without real cause, is sufficiently obvious.
Related Commentaries of Deuteronomy 5:11
Deuteronomy 5:11
11 Thou shalt not take the name of the LORD thy God in vain: for the LORD will not hold him guiltless that taketh his name in vain.