noun
attachment
uh-TACH-munt/əˈtætʃmənt/
The joining of something to a main body or object.
The attachment of the handle to the case is reinforced with metal rivets.

Etymology
Fastening supplies the image behind both senses: devotion is an emotional bond, while an email attachment is something joined to a message. The file sense extends the established meaning 'something attached to something else.'
In context
examples of uh emails containing malicious software. So number one is viruses. So viruses generally contain links or attachment that install uh viruses onto victim computers.
More examples
- The engineer checks the attachment of the wheel to the axle.
- The diagram shows the cable's attachment to the frame.
- Secure attachment of the bracket prevents the shelf from falling.
Forms
attachment · attachments
attach verb — To join one thing to another.