> -ist
agent noun suffix, also used to indicate adherence to a certain doctrine or custom, from Fr. -iste, from L. -ista, from Gk. -istes, from agential suffix -tes. Variant -ister (e.g. chorister, barister) is from O.Fr. -istre, on false analogy of ministre. Variant -ista is from Sp. form, popularized in Eng.
1970s by names of Latin-American revolutionary movements.