-aster

1
  1. a diminutive or pejorative suffix denoting something that imperfectly resembles or mimics the true thing: criticaster; poetaster, oleaster.

Origin of -aster

1
From Latin

-aster

2
  1. Chiefly Biology. a combining form with the meaning “star,” used in the formation of compound words: diaster.

Origin of -aster

2
< Greek astḗr star; cf. astro-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for -aster

-aster

suffix forming nouns
  1. a person or thing that is inferior or bears only a poor resemblance to what is specifiedpoetaster

Word Origin for -aster

from Latin: suffix indicating imperfect resemblance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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