uncorrupted

adjectives

(of language) not having its purity or excellence debased

"uncorrupted English"; "learn to speak pure English undefiled"- Van Wyck Brooks

uncorrupted, undefiled

not decayed or decomposed

uncorrupted, unspoiled

not debased

"though his associates were dishonest, he remained uncorrupted"; "uncorrupted values"

uncorrupted

is similar to

free of corruption or immorality

"a policeman who was incorrupt and incorruptible"