Postfix

n.	1.	(Gram.) A letter, syllable, or word, added to the end of another word; a suffix.
v. t.	1.	(Gram.) To annex; specifically (Gram.), to add or annex, as a letter, syllable, or word, to the end of another or principal word; to suffix.

Noun

1.

postfix - an affix that is added at the end of the word Synonyms: suffix

affix, ending, suffix, termination