Vicious

Characterized by vice or defects; defective; faulty; imperfect.

Addicted to vice; corrupt in principles or conduct; depraved; wicked; as, vicious children; vicious examples; vicious conduct.

Wanting purity; foul; bad; noxious; as, vicious air, water, etc.

Not correct or pure; corrupt; as, vicious language; vicious idioms.

Not well tamed or broken; given to bad tricks; unruly; refractory; as, a vicious horse.

Bitter; spiteful; malignant.