Added 9 October 2026 unprincipled /ʌnˈpɹɪnsɪpəld/ adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about unprincipled at Wordnik → Where our words come from → Lacking principles or moral scruples. freedom from coarse unprincipled calumny Having little or no integrity. Related Words: immoraldishonorabledishonourableamoralunscrupulousprincipesunscrupledmorallessconsciencelesslicentiousscrupleless Back to today's word