—n.
1 a verbal element added at the end of a word to form a derivative (e.g. -ation, -fy, -ing, -itis).
2 Math. = SUBSCRIPT.
—v.tr. also append, esp. as a suffix.
Derivatives:
suffixation n.
Etymology: suffixum, suffixus past part. of L suffigere (as SUB-, figere fix- fasten)
Useful english dictionary. 2012.