Where does “睡眠時遊行症” come from?

睡眠時遊行症 (Japanese) comes from Japanese 時, from Old Japanese 時, from Old Japanese しだ — a time, circumstance, occasion.

睡眠時遊行症 (Japanese): somnambulism, sleepwalking

Definitions

  1. somnambulism, sleepwalking

Ancestry of “睡眠時遊行症”, step by step

睡眠時遊行症 traces back through 3 separate lines of ancestry.

via Japanese 時

StepLanguageWordMeaning
1Japanese時time; an event, case, occasion, moment; a...
2Old Japanese時a time, moment (in time), occasion
3Old Japaneseしだa time, circumstance, occasion

via Japanese 症

StepLanguageWordMeaning
1Japanese症"attached to the names of conditions"
2Middle Chinese症—

via Japanese 睡眠

StepLanguageWordMeaning
1Japanese睡眠sleep
Every word from Old Japanese しだ →Every word from Old Japanese 時 →Every word from Japanese 時 →