Where does “沼間” come from?

沼間 (Japanese) comes from Japanese 沼, from Japanese 間, from Middle Chinese 間.

Ancestry of “沼間”, step by step

StepLanguageWordMeaning
1Japanese沼a swamp, a bog, a marsh, a wetland
2Japanese間interval; "suffixes some expressions of time to...
3Middle Chinese間—
Every word from Middle Chinese 間 →Every word from Japanese 間 →Every word from Japanese 沼 →