My turn came at last and I was able to participate in the game.
Why don't you participate in Tofugu's end-of-year party? It will be fun!
It’s been a while since I participated in a drinking party and I’m really enjoying it. I’m feeling super-charged!
When you participate, adding yourself to the activity, that is participation. Well done, you earn a gold star for participating!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.