unprincipled
adjectiveLacking principles or moral scruples; unscrupulous.
Not having settled principles; not grounded in principle.
Having no sound moral principles; destitute of virtue; not restrained by conscience; profligate; immoral.
Not resulting from good principles; iniquitous; wicked.
adjectiveBeing without principles; especially, being without right moral principles; also, characterized by absence of principle.
adjectivelacking
having little or no integrity
adjectivelacking principles or moral scruples