prevention

ultraviolet radiation

benefit (be or provide a benefit to)

useless, deadhead, good-for-nothing, a piece of shit / (politics) lame duck

prevent

防止: prevention / 帽子: hat, cap / 暴死: a sudden death, as from a heart attack / 鋩子: the tip of a sword or dagger blade

亡子: a deceased child / 亡姉: one's own deceased elder sister / 亡師: one's deceased teacher or mentor / 某氏: anonymous, an unnamed person / 某紙: a certain newspaper (indefinite or obscured reference)

紡糸: yarn; spinning fibre into thread / 傍視: looking to the side

紡糸: to spin yarn, to spin fiber into thread / 傍視: to look to the side

坊市: (rare) a town / 某誌: a certain magazine (indefinite or obscured reference)