*sir niky

taken from wikipedia

You shall not take the name of Jehovah your God in vain.
The literal meaning forbids misuse of any of God’s names in insincere or empty conversation, although it is allowed in swearing sincere oaths and should be used reverently in all worship.
In the spiritual meaning, the name of God means all the teachings of the Word, which are not to be used insincerely or evilly.
Taking God’s name in vain in the celestial sense means to deny the complete Divinity of the Lord Jesus Christ and to deny the holiness of the Word.