noun
opening a thumbturn from the other side of the door
Refers to the technique or tool used to rotate a thumbturn lock from outside, often in locksmithing or security contexts.
See also: サムターン
サムターン回しを使えば、外から簡単に鍵を開けられる場合がある。
Using a thumbturn opener, you may be able to unlock the door easily from outside.
防犯のために、サムターン回し対策をしておくことが重要だ。
For crime prevention, it is important to take measures against thumbturn opening.