-óg

• -eog (used after a slender consonant)
• -óig, -eoig (Cois Fharraige)

From Old Irish -óc (compare Scottish Gaelic -ag, Manx -ag), borrowed from Proto-Brythonic *-ọg, from Proto-Celtic *-ākos. Doublet of -ach. Not related to óg (“young”).

-óg f

1. used to form diminutives of nouns, or substantive nouns out of nominal, verbal, or adjectival roots

   ‎ciar (“black”) + ‎-óg → ‎ciaróg (“beetle”)

   ‎leadhb (“strip”) + ‎-óg → ‎leadhbóg (“shred, tatter”)

   ‎milis (“sweet”) + ‎-óg → ‎milseog (“dessert”)

   ‎pit (“vulva, vagina”) + ‎-óg → ‎piteog (“effeminate man, sissy, queer”)

   ‎reoite (“frozen”) + ‎-óg → ‎reoiteog (“ice cream”)

   ‎scréach (“screech”) + ‎-óg → ‎scréachóg (“jay”)

   ‎straois (“grin, grimace”) + ‎-óg → ‎straoiseog (“smiley, emoticon”)