"Amok"

       To complete a three day troika of "frenzied" words in English, neither Roman (Latin) nor Scandinavian (Old Norse) sources will suffice.  For this adverb (coming from a word meaning "fighting furiously, in a homicidal frenzy") we must traverse the world to Maylasia (Malay) to the word amuk.

       With "run" in "run amok," it has had its place in English since 1672:  "run about in a frenzied thirst for blood; go on a destructive rampage; rush wildly and heedlessly," says the OED.  Along with "delirious" and "berserk," "amok" is, yes, a term in good standing in the English language.