suffix Definition

suffix
noun suffixes

1. grammar.
A word-forming element that can be added to the end of a word or to the base form of a word, eg as a grammatical inflection such as -ed or -s in walked and monkeys or in the formation of derivatives, such as -less and -ly in helpless and lovely. Compare affix, infix, prefix.
2. math.
An index that is placed below the other figures in an equation, etc, eg the n in xn. Also called subscript.

verb suffixes, suffixed, suffixing

1. grammar.
To attach something as a suffix to a word.
2. To add (a suffix) to something.

Derivative: suffixation
noun

Etymology: 18c: from Latin suffixus fixed underneath, from sub under + figere to fasten.