I-adjective (keiyoushi)
round; circular; spherical
丸い usu. refers to ball-shaped, and 円い to disc-shaped objects
コロンブスは地球が丸いと信じていた。Columbus believed that the earth was round. curved; smooth
harmonious; calm; peaceful; amiable; amicable
see 丸く収まる
Also written 円い【まるい】