Crusader
来自Big Physics
late 16th century (originally as croisade ): from French croisade, an alteration (influenced by Spanish cruzado ) of earlier croisée, literally ‘the state of being marked with the cross’, based on Latin crux, cruc- ‘cross’; in the 17th century the form crusado, from Spanish cruzado, was introduced. The blending of these two forms led to the current spelling, first recorded in the early 18th century.
wiktionary
From crusade + -er.
etymonline
crusader (n.)
person engaged in a crusade, 1743, from crusade (n.) + -er (1). Earlier was croisader, from French croisadeur. In Middle English a crusader might be called a pilgrim.
