give somebody enough rope
US /ɡɪv ˈsʌmˌbɑːdi ɪˈnʌf roʊp/
UK /ɡɪv ˈsʌmˌbɑːdi ɪˈnʌf roʊp/

1.
十分な縄を与える, 自由にさせて失敗させる
to allow someone to do whatever they want, in the belief that they will eventually get into trouble or fail
:
•
Just give him enough rope, and he'll eventually mess things up on his own.
彼に十分な縄を与えれば、最終的には自分で物事を台無しにするだろう。
•
The manager decided to give the new employee enough rope to see if he could handle the responsibility.
マネージャーは、新入社員が責任を負えるかどうかを見るために、彼に十分な縄を与えることにした。