Meaning of “affix” - Learner’s Dictionary

affix

noun [ C ] uk us /ˈæfɪks/

a group of letters that you add to the beginning or the end of a word to make another word. In the word 'non-alcoholic', 'non-' is an affix.

→ Compare prefix , suffix

(Definition of “affix” from the Cambridge Learner’s Dictionary © Cambridge University Press)