Where does “急降下” come from?

急降下 (Japanese) comes from Japanese 急, from Middle Chinese 急.

急降下 (Japanese): nosedive; descent at a steep angle; plunge

Definitions

  1. nosedive; descent at a steep angle; plunge

Ancestry of “急降下”, step by step

急降下 traces back through two separate lines of ancestry.

via Japanese 急

StepLanguageWordMeaning
1Japanese急sudden
2Middle Chinese急—

via Japanese 降下

StepLanguageWordMeaning
1Japanese降下descent
Every word from Middle Chinese 急 →Every word from Japanese 急 →
急降下 — Etymology, Origin & Word History | Etymology Explorer