Protected from contact or interference by surrounding material; separated from other things or people.
From Latin 'insulatus' meaning 'made into an island' (from 'insula' meaning island). Originally described making something separate or detached, then came to mean protecting something with insulation material.
The word literally means 'made into an island'—something insulated is alone and cut off, like an actual island. That's why insulated groups, insulated houses, and insulated feelings all share the same root: they're all about separation and protection through isolation.
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