noun
Sinn Féin
Refers to the Irish republican political party. Used in Japanese political and news contexts.
シンフェイン党は北アイルランドの主要政党の一つだ。
Sinn Féin is one of the major political parties in Northern Ireland.
From Irish 'Sinn Féin' ('we ourselves'), via English. The Japanese form adds 党 (party).