attach
To fasten, to join to (literally and figuratively).
Example
“You need to attach the carabiner to your harness.”
Other meanings
To adhere; to be attached.
To include an attachment with a communication (especially an email or other electronic communication).
“I've attached the contract to this email.”
Word history
From Old French "atachier".
Where this comes from
This definition is adapted from “attach” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.