To attach is to fasten or join one thing to another, or to connect a file or document to an email or message.
It comes from Old French *atachier*, related to *tache* 'stake, fastening'. It originally meant to fix or fasten something firmly.
We now 'attach' emotions as well as objects: you can be attached to a person, place, or idea. That mental gluing is as real as tape or nails—it strongly shapes what you’re willing to let go of or change.
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