Where does “津波警報” come from?

津波警報 (Japanese) comes from Japanese 津波, from Japanese 波, from Middle Chinese 波.

津波警報 (Japanese): a tsunami warning

Definitions

  1. a tsunami warning

Ancestry of “津波警報”, step by step

津波警報 traces back through two separate lines of ancestry.

via Japanese 津波

StepLanguageWordMeaning
1Japanese津波a tsunami; a tidal wave; a tidal bore
2Japanese波wave
3Middle Chinese波—

via Japanese 警報

StepLanguageWordMeaning
1Japanese警報alarm, alert, warning
Every word from Middle Chinese 波 →Every word from Japanese 波 →Every word from Japanese 津波 →