Where does “補助動詞” come from?

補助動詞 (Japanese) comes from Japanese 動詞 — verb.

補助動詞 (Japanese): a free Japanese verb (自立語) that can be grammaticalized by being attached to an inflectional form of another 用言

Definitions

  1. a free Japanese verb (自立語) that can be grammaticalized by being attached to an inflectional form of another 用言

Ancestry of “補助動詞”, step by step

補助動詞 traces back through two separate lines of ancestry.

via Japanese 動詞

StepLanguageWordMeaning
1Japanese動詞verb

via Japanese 補助

StepLanguageWordMeaning
1Japanese補助help, aid
Every word from Japanese 動詞