Antonyms of adj impeccant

1 sense of impeccant

Sense 1
impeccant, innocent, sinless -- (free from sin)

INDIRECT (VIA virtuous) -> wicked -- (morally bad in principle or practice)

Similarity of adj impeccant

1 sense of impeccant

Sense 1
impeccant, innocent, sinless -- (free from sin)
       => virtuous (vs. wicked) -- (morally excellent)