Webster’s Revised Unabridged Dictionary · 1913
Suffix
Suf′fix (sŭf′fĭks), n. [L. suffixus, p. p. of suffigere to fasten on, to affix; sub under + figere to fix: cf. F. suffixe. See Fix.] 1. A letter, letters, syllable, or syllables added or appended to the end of a word or a root to modify the meaning; a postfix.
2. (Math.) A subscript mark, number, or letter. See Subscript, a.
Suf·fix′, v. t. [imp. & p. p. Suffixed; p. pr. & vb. n. Suffixing.] To add or annex to the end, as a letter or syllable to a word; to append.