穴

storage pit (esp. Jomon to Yayoi periods)

tunnel tomb (Kofun period)

flat or stone broke

Noun or verb acting prenominally

boring (a hole)

needle with a normal eye

perforations (e.g. in film)

Sensitive

blind hole

Geology

giant's kettle; giant's cauldron; pothole

common Japanese conger eel (Conger myriaster); whitespotted conger

swiftlet

kanji "hole" radical at top

ferret badger (esp. the Chinese ferret-badger, Melogale moschata)

burrowing owl (Athene cunicularia)

duck-billed eel (Nettastoma parviceps)

spinycheek sleeper (Eleotris oxycephala); spined sleeper

sheep's ear abalone (Haliotis ovina)

chuck-farthing (game of throwing coins in a hole); pitch-farthing

Japanese mud shrimp (Upogebia major)

Horse racing

possible winner (in a horse race); third favorite

to fill in a hole

to plug a gap (money, personnel, etc.); to make up for a deficiency; to cover a deficit

to fill a hole with earth

(to be ashamed enough) to wish you could just disappear; wanting to sink into the ground in shame

Idiomatic expression

to find someone's weak spot; to drill a hole

to penetrate a body (e.g. with a spear or bullet)

to breathe new life into; to provide a potential solution