円まる鉋がんなMeanings1nounround carpenter's planeA woodworking plane with a curved sole, used for shaping concave surfaces or hollowing out wood. Specialized term; not an everyday word.職しょく人にんは円まる鉋がんなで椅い子すの座ざ面めんを削けずった。The craftsman shaped the chair seat with a round plane.