An example of ist used as a suffix is in the word druggist, a person with an interest in drugs and medications.
Origin of ist
- ME -iste < OFr < L -ista < Gr -istēs < verbs ending in -izein
From Webster's New World College Dictionary, 5th Edition
- Middle English -iste from Old French from Latin -istēs, -ista from Greek -istēs agent n. suff
From American Heritage Dictionary of the English Language, 5th Edition