leave to someone s own devices イディオム
Left to your own devices
If someone is left to their own devices, they are not controlled and can do what they want.
leave to someone's own devices
leave to someone's own devices
Allow someone to do as he or she wishes. For example, Left to his own devices, he would hire someone to do the yard work. This expression, uses device in the sense of “a plan or scheme.” [Late 1800s]leave to someone's own devices
leave to someone's own devices
Allow addition to do as he or she wishes. For example, Left to his own devices, he would appoint addition to do the backyard work. This expression, uses device in the faculty of “a plan or scheme.” [Late 1800s]
Left to your own devices
If addition is larboard to their own devices, they are not controlled and can do what they want. Dictionary