Italian

Suffix

-astro m ‎(feminine -astra, masculine plural -astri, feminine plural -astre)

1. (forms nouns and adjectives) Used to express incomplete resemblance, generally with a pejorative connotation:
   1. Used to form pejoratives; -aster, -ster

      giovine ‎(“young”) → giovinastro ‎(“youngster”)

      poeta ‎(“poet”) → poetastro ‎(“poetaster”)

   2. (appended to a colour) -ish

      bianco ‎(“white”) → biancastro ‎(“whitish”)

   3. (appended to fratello, sorella, figlio or figlia) step-

      fratello ‎(“brother”) → fratellastro ‎(“stepbrother”)

      sorella ‎(“sister”) → sorellastra ‎(“stepsister”)

Derived terms

References

1. ↑ “-astro” in: Alberto Nocentini, Alessandro Parenti, “l'Etimologico — Vocabolario della lingua italiana”, Le Monnier, 2010, ISBN 978-88-00-20781-2

Latin

Adjective

-astrō

1. dative masculine singular of -aster
2. dative neuter singular of -aster
3. ablative masculine singular of -aster
4. ablative neuter singular of -aster

Portuguese

Suffix

-astro m ‎(feminine -astra, plural -astra, feminine plural -astras)

1. -aster (forms pejoratives)

Spanish

Suffix

-astro m ‎(f -astra)

1. Used to form nouns with a pejorative or lower meaning.

   político (politician) - politicastro (corrupt politician)

   hermano (brother) - hermanastro (stepbrother)

   hijo (child) - hijastro (stepchild)