-gon

From Ancient Greek γωνία (gōnía, “corner, angle”), from Proto-Indo-European *ǵónu (“knee”).

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-gon

1. (geometry) Forms the names of plane figures containing a given number of internal angles, and thus bounded by that number of line segments (polygons).

   Synonym: -angle

   Coordinate terms: -hedron, -choron, -hedroid, polytope

   A pentagon has five sides.

   a 17-gon

• -gonal

• NGO, Ngo, Ong, nog

None; due to Abinomn's possible nature of being a language isolate.

-gon

1. forms plurals of certain nouns ending with an "i" sound, as opposed to -kon and -di

Borrowed from Ancient Greek γωνία (gōnía).

-gon m (noun-forming suffix, plural -gons)

1. (geometry) -gon

• “-gon”, in Diccionari de la llengua catalana [Dictionary of the Catalan Language] (in Catalan), second edition, Institute of Catalan Studies [Catalan: Institut d'Estudis Catalans], April 2007
• “-gon”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025
• “-gon” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.

Ultimately from Ancient Greek γωνία (gōnía).

• IPA^(key): /ˈɡoːn/

-gon

1. (geometry) -gon

• -hörning

• nog