Linguistics term covering prefixes, suffixes, infixes, etc. Used in grammatical descriptions.
「接辞」は、語の前や後ろに付いて意味を付け加える要素です。
An 'affix' is an element that attaches to the front or back of a word to add meaning.
From 接 (attach) + 辞 (word/expression), a Meiji-era coinage for the linguistic concept of affix.