Suf"fix (?), 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.

Suf"fix (?), 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.

• one or more letters or sounds added at the end of a word to modify the word's meaning
        Example: word sing + suffix able, result singable
  
• append something to the end of something else