肆虐

sìnüè
to wreak havoc; to devastate

CEDICT

to wreak havoc; to devastate

Wiktionary

恣意作惡為禍。

重編國語辭典

Entry Composition

1 肆 sì
  1. four (banker's anti-fraud numeral)
  2. unrestrained
  3. wanton
  4. (literary) shop
2 虐 nüè
  1. (bound form) brutal; oppressive; harsh
  2. (literary) disaster; catastrophe