Word Knowledge

What does the suffix -ist mean?

In working as an ASVAB tutor, I remind my students of the importance of studying prefixes, root word, and suffixes.  In my book, The ASVAB Tutor’s Word Knowledge and Paragraph Comprehension Study Guide, I present charts of many common prefixes, root words, and suffixes.  One of the common suffixes is -ist.  There are many words with the suffix -ist.  Here are some examples: artist. scientist, botanist, horticulturalist, florist, and chemist.  Do you know what the suffix -ist means?  I will present the answer and explanation tomorrow.