穴 means 'hole'

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Strokes : 5    Radical number: 116    Frequency: 1113   JLPT: N1    Usefulness: 5    Study set: 5-12    Grade: 6   Intermediate lesson: -    Beginner lesson: -   Begins 42 words   Used in 122 words   Used in 420 names   Component in 96 kanji (11 Jōyō)
Jōyō (常用)
   あな hole
Name    けな   しし   な
When used as a component, this usually looks like the combination of (roof) and (legs). A similar component exists which looks like the combination of (cover; covered) and (legs) (i.e. (net)) which is actually a variant of 'net'.
Learn to perceive the whole hole in characters such as (window), rather than mistaking the top part for the 宀 radical. And find out why the sky (15: 空) has holes in it!
⿱   roof   () katakana 'ha'; eight  
Explore these components visually on The Kanji Map ⇗
 lack   () net  
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In the most useful 10,000 words in Japanese, 穴 is used 3 times, read 2 ways (with 1 variation).
Across all words in Japanese, 穴 is used 117 times, read 2 ways (with 1 variation).
ケツ : 21 words FIND ALL
grave, specifically the hole in the ground
(click the word to view an additional 1 reading, examples and links)
ケツ (read as けっ) : 2 words FIND ALL
cave dwelling; troglodytism
(click the word for examples and links)
あな : 94 words FIND ALL
noun, noun (suffix)
1. hole  (see also: 穴が開く; also read めど for this sense)
2. deficit; shortage; missing person (in a team, meeting, etc.)
(click the word to view an additional 7 meanings and 2 forms, useful expressions, examples and links)
An additional when looks like combination of 宀 and 儿, use hole; when top is 冖, ie 㓁, use net less common words include 穴 but the reading has not yet been categorized.
Henshall: 860 (originally: 849)  Joy o' Kanji : 849  Key to Kanji: 264 

Cascading kanji view

ケツ   あな hole   
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katakana 'ha'; eight
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