-ist Look up -ist at Dictionary.com
word-forming element meaning "one who does or makes," also used to indicate adherence to a certain doctrine or custom, from French -iste and directly from Latin -ista, from Greek -istes, from -is-, ending of the stem of verbs in -izein, + agential suffix -tes. Variant -ister (as in chorister, barrister) is from Old French -istre, on false analogy of ministre. Variant -ista is from Spanish, popularized in American English 1970s by names of Latin-American revolutionary movements.