IPA: /məˈlɛvələntli/
KK: /mɛˈlɛvələntli/
In a way that shows a desire to harm others or do evil.
The villain laughed malevolently as he plotted his revenge.
Malevolently → It is formed from "male-" (from Latin *male*, meaning badly or ill) and "volens" (from Latin *volens*, meaning wishing or willing) and the suffix "-ly" (meaning in a manner). The word "malevolently" means in a manner that wishes bad or ill towards others.
Think of 'wishing badly' ('male-' means badly and 'volens' means wishing) to remember that 'malevolently' describes acting with ill will.