隅から隅まで

from corner to corner

→ 隅
phrase Rare #36,551
from corner to corner Means thoroughly or every part of something, often translated as “from end to end” or “inside and out.” The first 隅 may also be written in hiragana as すみ.
JA: 部屋を隅から隅まで掃除しました。
EN: I cleaned the room from corner to corner.

私はその町の隅から隅まで知っている

I know that town like the back of my hand.

隅から隅まで探した

Did you look everywhere?

私はニューヨーク隅から隅まで知っている

I know New York inside and out.