裂罅 is read as れっか (rekka) and means fissure.
れっか
rekka
さく
to forcibly separate (e.g. two lovers)
さけめ
tear
さける
to split
れっかいか
dehiscent fruit
れっかい
dehiscence
さきおり
sakiori
れっそう
laceration
ぶんれつ
split
はれつ
breakdown (of talks, negotiations, etc.)
しぶんごれつ
torn asunder
けつれつ