-mak
(İngilizce)
Form of -mek after the vowels A / I / O / U.
O
The eighteenth letter of the Turkish alphabet, called o and written in the Latin script.
U
The twenty-fifth letter of the Turkish alphabet, called u and written in the Latin script.
I
The eleventh letter of the Turkish alphabet, called ı and written in the Latin script.
Etimoloji (İngilizce)
In summary
From Ottoman Turkish ـمق (-mak), from Proto-Turkic *-mak.