ついに

The word ついに is an adverb that can mean "at last", "finally", or "in the end." It's generally used to convey that something has finally happened (or hasn't happened) after a long period of waiting, longing for it, or trying to make it happen, while you've potentially suffered in the process.

4年間頑張って勉強して、ついに卒業の日が来た。うれしいけれど、ちょっと寂しい。
For four years I worked so hard to study, and finally my graduation day has come. I'm really happy, but also a little sad.

ついに、リーさん富士山に登ってことが出来て、気持ちは高揚したんだ。
At last, Lee-san was able to climb Mt. Fuji, and his spirits soared.

兄は長い間頑張ってきたが、ついにプロのフットボール選手になる夢をあきらめた。
My older brother worked so hard for such a long time, but in the end he gave up on his dream to become a professional football player.

夕べ、ついにアヤト来た！素敵な人なんだろう。
Last night, finally, Ayato came! He's so dreamy~.