Translation guide
In Japanese, the concept of an affix (prefix or suffix) is expressed using specific grammatical terms. The most common and general term is 接辞 (せつじ). When referring to a prefix, use 接頭辞 (せっとうじ); for a suffix, use 接尾辞 (せつびじ). These are technical linguistic terms, but they are widely understood in educational contexts.
This is the standard linguistic term for 'affix'. It covers both prefixes and suffixes. Use this in academic or technical discussions about language.
Affixes can change the meaning of a word.
The learner wants to specifically refer to a prefix, an affix placed before a word root.
This is the standard term for 'prefix'. Use it in linguistic contexts.
'O' is a prefix that expresses politeness.
The learner wants to specifically refer to a suffix, an affix placed after a word root.
This is the standard term for 'suffix'. Use it in linguistic contexts.
'Tachi' is a suffix that indicates plurality.
These terms are technical and mainly used in academic or educational settings. In casual conversation, Japanese speakers might simply describe the function rather than use the specific term. For example, instead of saying '接頭辞', they might say '前につける言葉' (a word you attach to the front).