To switch means to change from one thing to another, such as switching tasks, sides, or devices. It can also mean to turn something electrical on or off with a switch.
From Middle Dutch 'swijch' meaning 'long thin stick', which became 'switch' in English for a flexible rod. Later it was used for the lever that turns things on and off, then for the act of changing itself.
Every time you 'switch' apps, devices, or tasks, your brain pays a small cost to re-focus. The simple word hides how much invisible mental energy modern life demands from us.
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