Where does “最長” come from?

最長 (Japanese) comes from Japanese 長, from Middle Chinese 長.

最長 (Japanese): the longest

Definitions

  1. the longest

Ancestry of “最長”, step by step

最長 traces back through two separate lines of ancestry.

via Japanese 長

StepLanguageWordMeaning
1Japanese長chief, head, leader; strong point; major
2Middle Chinese長—

via Japanese 最

StepLanguageWordMeaning
1Japanese最most, greatest
2Proto-Indo-Europeansai-—

Words derived from “最長”

Every word from Middle Chinese 長 →Every word from Japanese 長 →
最長 — Etymology, Origin & Word History | Etymology Explorer