Role
Part, Duty, Service
noun, suffix
If you have a certain duty then it's your job to play that role. You have to play the part. Like in a play!
やく
The reading is the same as the kanji you learned, meaning you should be able to read this one as well.
コウイチが、クママン役でドラマに出えんすることになりました。
Koichi played the role of Kumaman in the drama.
コウイチは役作りのために、一年間ホームレスになってみました。
In order to prepare for the part, Koichi became homeless for a year.
マイケル、めちゃくちゃ役になりきってるじゃん。
Michael is throwing himself into the role very well, eh?