grossly
He had grossly misused his power.

widely misused
‘Marketing’ is a widely misused word in the book business.

Misuse is used with these nouns as the object:
fund, word

alleged, possible
deliberate
gross, serious
criminal (AmE)
Can manufacturers be held liable for the criminal misuse of their products?

alcohol, drug, substance
alcohol misuse among teenagers

computer (esp. BrE)
He was fired for computer misuse.

prevent, stop
investigate

through misuse
pollution caused through misuse of pesticides

misuse of
He was accused of the misuse of public funds. (esp. BrE)