Etymology: < Latin -aster, suffix of nouns and adjectives, expressing incomplete resemblance, hence generally pejorative (Diez); e.g. Latin philosophaster a petty philosopher, oleaster a wild or bastard olive, surdaster a little deaf. Extensively used in Romance languages (Italian -astro, Spanish -astro, -astre, Provençal -astre, Old French -astre, modern French -âtre), esp. in French as adjectival suffix, e.g. bleuâtre bluish, blanchâtre whitish, etc. In English only in words from Latin or Romance, e.g. astrologaster, grammaticaster, oleaster, poetaster, politicaster.
This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2020).