amok

 
Pronunciation: /əˈmɒk/
(also amuck)

adverb

(in phrase run amok)
  • behave uncontrollably and disruptively: stone-throwing anarchists were running amok

Origin:

mid 17th century: via Portuguese amouco, from Malay amok 'rushing in a frenzy'. Early use was as a noun denoting a Malay in a homicidal frenzy

Spelling help

Amok can also be spelled amuck; both are correct, although amok is far more common.