Learn how to say Affix correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word affix:
stick, attach, or fasten (something) to something else:
panels to which he affixes copies of fine old prints
[no object] be able to be fixed:
the strings affix to the back of the bridge
an addition to the base form or stem of a word in order to modify its meaning or create a new word. Compare with prefix, suffix, infix.
late Middle English: from Old French affixer or medieval Latin affixare, frequentative of Latin affigere, from ad- ‘to’ + figere ‘to fix’