noun
wooden sewer cover
Refers to a wooden board or plank used to cover a sewer or drainage channel. A specific, somewhat technical term.
古い町並みでは、下水板が今も使われている。
In old townscapes, wooden sewer covers are still used.
General term for a ditch or gutter cover, not necessarily wooden.
Compound of 下水 (sewer) and 板 (board, plank). The reading げすいいた follows standard on'yomi for 下水 and kun'yomi for 板.