Noah Webster's Dictionary (a.) Being without principles; especially, being without right moral principles; also, characterized by absence of principle.

Multi-Version Concordance Unprincipled (4 Occurrences) Ephesians 4:14 in order that we may be no longer babes, tossed and carried about by every wind of that teaching which is in the sleight of men, in unprincipled cunning with a view to systematized error; (DBY) 2 Peter 2:7 and delivered righteous Lot, who was very distressed by the lustful life of the wicked (See NAS) 2 Peter 3:16 That is what he says in all his letters, when speaking in them of these things. In those letters there are some statements hard to understand, which ill-taught and unprincipled people pervert, just as they do the rest of the Scriptures, to their own ruin. (WEY) 2 Peter 3:17 You therefore, beloved, knowing these things beforehand, beware, lest being carried away with the error of the wicked, you fall from your own steadfastness. (See NAS)