Noah Webster's Dictionary (adv.) In a manner to deceive.

Multi-Version Concordance Deceptively (2 Occurrences) 2 Kings 10:19 Now send for all the prophets of Baal and all his servants and all his priests, to come to me; let no one keep away: for I have a great offering to make to Baal; anyone who is not present, will be put to death. This Jehu did with deceit, his purpose being the destruction of the servants of Baal. (See NIV) Proverbs 25:14 As clouds and wind without rain, so is he who boasts of gifts deceptively. (WEB)