noun
A linguistic term for a morpheme added at the end of a word to modify its meaning or grammatical function.
「食べる」の「食べ」は語幹で、「る」は接尾辞です。
In 'taberu', 'tabe' is the stem and 'ru' is a suffix.
接辞 is the broader term for 'affix', encompassing both prefixes and suffixes.
Compound of 接 (setsu, 'attach') + 尾 (bi, 'tail') + 辞 (ji, 'word'), literally 'tail-attaching word'. A straightforward kanji compound for the linguistic concept of a suffix.