Malevolent

Adjective.

1: having, showing, or arising from intense often vicious ill will, spite, or hatred.

2: productive of harm or evil.

-malevolently, adverb.

[Origin: Latin malevolent-, malevolens, from male badly + volent-, volens, present participle of velle to wish.]

(1509)

“He had a vision of that lone velvety ear, fluttering like a huge malevolent moth through the attics at the Schloss.” – Wash This Blood Clean From My Hand, Fred Vargas.