na-adjective
Describes actions, behavior, or methods that involve physical force intended to hurt, damage, or coerce. Often used in contexts like crime, protests, or aggressive conduct.
彼の暴力的な態度に周りの人は怖がった。
People around him were frightened by his violent attitude.
暴力的な手段
You must not solve problems by violent means.
乱暴 can mean 'violent' or 'rough' as an adjectival noun, but also carries nuances of 'reckless' or 'rude'. 暴力的 is more directly about physical violence.
Compound of 暴力 (violence) + 的 (suffix forming adjectival nouns).