Definition of -gon in English:

-gon

Syllabification: -gon

combining form

In nouns denoting plane figures with a specified number of angles: hexagon pentagon

Origin

from Greek -gōnos '-angled'.

Definition of -gon in:

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Word of the day vituperate
Pronunciation: vɪˈtjuːpəreɪt
verb
blame or insult (someone) in strong language...