胎内くぐり たいないくぐり Also written 胎内潜り Meanings Noun going through a cave, grass ring or the interior of a large Buddhistic statue, etc. (symbolizing rebirth) narrow grotto (into which a person can barely fit) Kanji 胎 womb. Read as タイ. 内 inside. Read as ナイ. Jinuma: Japanese Dictionary · Word lists