鼻穴 is read as びけつ (biketsu) and means nostril.
びけつ
biketsu
はなのあな
nostril
びえん
rhinitis
はなさきじあん
superficial (shortsighted) way of thinking
はなもとじあん
びちゅうかくわんきょくしょう
nasal septum deviation
ぼけつ
grave (pit)
どうけつ
cave
あな
(partitioned) box (type of floor seating in a traditional Japanese theatre)
かざあな
air hole
おうけつ
tunnel tomb (Kofun period)
おとしあな
pitfall
おおあな
large hole