hěn​hěn

ruthlessly

狠狠 hěn​hěn
ruthlessly adverb
in a fierce, severe, or cruel manner

He gave that person a sound beating.

resolutely adverb
with great determination and firmness of purpose

He is determined to kick this bad habit for good.

Frequency

Movie subtitles
14.6 per million appears in 6% of films
Written text
16.9 per million

Sources

Definitions
CC-CEDICT