Where does “弩級” come from?

弩級 (Japanese) comes from Japanese 級, from Middle Chinese 級.

弩級 (Japanese): Dreadnought class

Definitions

  1. Dreadnought class

Ancestry of “弩級”, step by step

弩級 traces back through two separate lines of ancestry.

via Japanese 級

StepLanguageWordMeaning
1Japanese級rank; a class
2Middle Chinese級—

via Japanese ドレッドノート

StepLanguageWordMeaning
1Japaneseドレッドノート—
Every word from Middle Chinese 級 →Every word from Japanese 級 →