環かん状じょう鉄てっ心しんMeaningsNoun1. toroidal core; endless coreKanji used環loop状condition鉄iron心heartComposed of環かん状じょうannulation; ring shape; loop shapeNoun鉄てつiron (Fe); steel; iron (will, discipline, lady, etc.); railwayNoun心しんheart; mind; spirit; vitality; inner strength; bottom of one's heart; core (of one's character); nature; centre; center; …Noun