principled

adjectives

based on or manifesting objectively defined standards of rightness or morality
"principled pragmatism and unprincipled expediency"; "a principled person"
principled
antonym
unprincipled
is similar to
having high principles
high-principled
see also
having scruples; arising from a sense of right and wrong; principled
"less scrupulous producers sent bundles that were deceptive in appearance"
scrupulous