auxiliary inflecting word
Linguistics term covering Japanese auxiliary verbs (補助動詞) and auxiliary adjectives (補助形容詞). Used in grammatical descriptions.
The 'iru' in '~te iru' is a kind of auxiliary inflecting word.
Auxiliary inflecting words include auxiliary verbs and auxiliary adjectives.
Compound of 補助 (hojo, 'auxiliary') + 用言 (yōgen, 'inflecting word'). A modern linguistic term.