孔 means 'cavity'

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Strokes : 4    Frequency: 1310   JLPT: N1    Usefulness: 5    Study set: 5-18    Grade: 8   Intermediate lesson: -    Beginner lesson: -   Begins 19 words   Used in 99 words   Used in 87 names   Component in 2 kanji (0 Jōyō)
Jōyō (常用)
Kun    あな cavity, hole, slit, very, great, exceedingly
Name    のり
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It makes sense to find our kanji as “hole” in terms such as “nostril,” “porous,” “perforation,” “vent,” and “buttonhole.” What a surprise, though, to discover its connections to Confucius on the one hand and peacocks on the other. By studying peacocks we end up contemplating ancient Indian beliefs, ferns, malachite, and the dining habits of medieval elites from Europe to Japan!
⿰   () child   () second  
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In the most useful 10,000 words in Japanese, 孔 is used 1 time, read 1 way.
Across all words in Japanese, 孔 is used 83 times, read 2 ways.
コウ : 74 words FIND ALL
pupil; pupillary
(click the word for examples and links)
あな : 9 words FIND ALL
nesting hole; burrow; den
(click the word to view an additional 1 form, examples and links)
An additional 16 less common words include 孔 but the reading has not yet been categorized.
Henshall: 1241  Joy o' Kanji : 1241  Key to Kanji:

Cascading kanji view

コウ    cavity   
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second   おつ    
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