Completion
Complete, Finish, Conclusion
noun, する verb, の adjective
A perfect finish is when everything is at total completion. Nothing is left over and all is done.
かんりょう
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.
作戦完了！
Mission complete!
この町でしばらくつづいていたさい開発工事がようやく完了した。
The redevelopment that's been ongoing for a while in this town has finally been completed.
携帯の充電が完了してから折り返してもいいかな？
I’ll call you back when my cellphone battery has finished charging, okay?