Suffix

Part of speech: noun (n.)

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. A subscript mark, number, or letter. See Subscript, a.

Part of speech: verb (v.)

To add or annex to the end, as a letter or syllable to a word; to append.