- a suffix of nouns that denote a person who practices or is concerned with something, or holds certain principles, doctrines, etc.: enthusiast;ecdysiast; gymnast.
Origin of -ast
a variant of -ist after the vowel i; from Greek -astēs
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
agential suffix, cognate with -ist, from French -ast, from Latin -asta, from Greek -astes.
Online Etymology Dictionary, © 2010 Douglas Harper