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device

device /dɪˈvaɪs/ noun
plural devices
device
/dɪˈvaɪs/
noun
plural devices
Britannica Dictionary definition of DEVICE
[count]
: an object, machine, or piece of equipment that has been made for some special purpose
: a weapon that explodes
: something that is done in order to achieve a particular effect
: something in a book, play, poem, movie, etc., that is used to achieve a particular effect

leave you to your own devices

◊ If someone leaves you to your own devices or you are left to your own devices, you are allowed to do what you want or what you are able to do without being controlled or helped by anyone else.