D defs.my
Entry 1 sense Webster, 1913

Unprincipled

/ən-prĭn'-səp-əld/ · Un·prin·ci·pled · IPA /ʌnˈpɹɪnsɪpəld/
01 a. Being without principles; especially, being without right moral principles; also, characterized by absence of principle.
  1. 1.
    Being without principles; especially, being without right moral principles; also, characterized by absence of principle.