Dictionary

To attach.

Example: to affix a stigma to a person

To subjoin, annex, or add at the close or end; to append to.

Example: to affix a seal to an instrument

To fix or fasten figuratively; with on or upon.

Example: eyes affixed upon the ground

Affixation

Of the function or role of an affix

Example: Prefixes, suffixes, and infixes are all affixing particles.