completely, entirely, thoroughly
When I explained my reasoning, he became completely convinced that it was the answer.
I hope you make a complete recovery and feel like your old self again soon.
一瞬タイラーの爆破作戦の事をすっかり忘れ銃が清潔かどうか気にしてた
For a moment, I completely forgot about Tyler’s bombing operation and was worrying about whether the gun was clean.
— ファイト・クラブ (1999)
Maybe he’d gotten completely used to confessing, because he confessed again.
彼の外見はすっかり変わってしまったので、おそらく君は彼だとわからないだろう。
His appearance has changed so much that you probably wouldn’t recognize him.
He was completely exhausted because he had been working on the farm all day.