crusade
n.
1706, respelling of croisade (1570s), from Middle French croisade (16c.), Spanish cruzada, both from Medieval Latin cruciata, past participle of cruciare "to mark with a cross," from Latin crux (genitive crucis) "cross." Other Middle English forms were croiserie, creiserie. Figurative sense of "campaign against a public evil" is from 1786.
v.
1732, from crusade, n.. Related: Crusaded; crusading.
〔李〕[crus;-aden.] n.十字军东征； 宗教战争 ←cruc (L crux, cruces)=cross 十字，叉
〔蒋〕[crus=cruc十字，-ade名词后缀，表示集体] 十字军