noun
assassin's bullet; bullet from an assassin
Used in news reports and formal writing to refer to a bullet fired by an assassin or in a politically motivated attack.
政治家が凶弾に倒れた。
The politician fell to an assassin's bullet.
彼は凶弾に斃れた英雄として記憶されている。
He is remembered as a hero who fell to an assassin's bullet.
銃弾 is a general term for a bullet from a gun, while 凶弾 specifically refers to a bullet fired with malicious intent, especially in an assassination or attack.
Compound of 凶 (bad, evil) and 弾 (bullet). The kanji 凶 conveys the malicious nature of the shooting.