裂罅 is read as れっか (rekka) and means fissure.
れっか
rekka
さけめ
tear
さける
to split
れっかいか
dehiscent fruit
れっかい
dehiscence
さけやすい
easily torn
さきおり
sakiori
れっそう
laceration
れっしょう
ぶんれつ
split
はれつ
breakdown (of talks, negotiations, etc.)
しぶごれつ
torn asunder