Berserk
Etymology
From Old Norse berserkr, a Norse warrior who fought in a wild, trancelike frenzy. The name is probably “bear-shirt” (ber-, “bear,” plus serkr, “shirt”), one clad in bearskin — though some read it as “bare-shirt,” fighting without armor; the two readings are disputed. Sir Walter Scott introduced the word to English in 1822.
adjective · /ber-ZURK/
Wildly and destructively out of control, as if seized by uncontrollable rage.
What it names
The state of frenzy in which restraint vanishes entirely — fury or chaos with nothing holding it back.
Example
The printer jammed for the fifth time and he finally went berserk on it.
Related idea
Frenzied describes wild agitation; berserk adds destructive, out-of-control rage, as if every restraint has snapped.