堀 - ditch, moat, canal

fish pond (artificially stocked); fishing pond

moat; fosse

canal

outer moat (of a castle)

inner moat; moat within the castle walls

canal

man-made water channel (e.g. round a castle); artificial trench; moat

to dig up messily

canal; waterway; ditch

side of a moat

dry moat

to remove obstacles in the way of one's objective; to take an indirect approach; to fill in the outer moat