WORD ORIGIN a diminutive or pejorative suffix denoting something that imperfectly resembles or mimics the true thing: criticaster; poetaster, oleaster. Origin of -aster 1
Latin . Chiefly Biology a combining form with the meaning “star,” used in the formation of compound words: diaster.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for -aster suffix forming nouns a person or thing that is inferior or bears only a poor resemblance to what is specified poetaster Word Origin for -aster
from Latin: suffix indicating imperfect resemblance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for -aster
word-forming element expressing incomplete resemblance (e.g.
poetaster), usually diminutive and deprecatory, from Latin, from Greek -aster, suffix originally forming nouns from verbs ending in -azein, later generalized as a pejorative suffix, e.g. Greek patraster "he who plays the father."
Online Etymology Dictionary, © 2010 Douglas Harper