The kanji 窟 means “cavern”. It is read クツ, コツ, いわや, いはや, あな. It is a JLPT N3 kanji.
窟 is written in 13 strokes, in the order below.
Add it to your reviews: it comes back at the right time until you know it. Learn this kanji
They appear in the same words as 窟.