堀 - ditch, moat, canal

outer moat (of a castle)

inner moat; moat within the castle walls

fish pond (artificially stocked); fishing pond

canal

canal

moat; fosse

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

digging deeply (below the surface); mining deep

to be clear of obstacles in the way of one's objective

side of a moat

pocket gopher

dry moat