IPA: //ˌʌltrəˈvaɪlənt//
KK: /ˈʌltrəˌvaɪlənt/
Very extreme in terms of violence or aggression.
The movie was criticized for its ultraviolent scenes that shocked many viewers.
Ultraviolent → It is formed from "ultra-" (meaning beyond) and "violent" (from Latin "violentus", meaning violent or forceful). The word "ultraviolent" describes something that is beyond violent, often referring to extreme or excessive violence.
Think of 'beyond' ('ultra-') and 'forceful' ('violent') to remember that 'ultraviolent' means something that is extremely violent.
No commonly confused words.