device · noun C /dɪˈvɑɪs/Full view
B2 a piece of equipment that is used for a particular purpose
Dictionary examples:

an electronic device

Rescuers used a special device for finding people trapped in collapsed buildings.

Learner example:

I have much more time for many other things during the day thanks to [the] devices modern technology offers us. (First Certificate in English; B2; Russian)

leave someone to their own devices
C2 to leave someone to do what they want to do
Dictionary example:

With both parents out at work, the kids were often left to their own devices.

Learner example:

The moment teenagers leave school, they are left to their own devices. (Certificate of Proficiency in English; C2; Russian)

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