Components
腐る is an exact match with one form of the following word:
腐る
BOOST
Reading : くさる   
'ru' godan verb, intransitive verb
1. to rot; to go bad; to decay; to spoil; to fester; to decompose; to turn sour (e.g. milk)
2. to corrode; to weather; to crumble
3. to become useless; to blunt; to weaken (from lack of practice)
4. to become depraved; to be degenerate; to be morally bankrupt; to be corrupt
5. to be depressed; to be dispirited; to feel discouraged; to feel down  (see also: 気が腐る:きがくさる)
6. indicates scorn or disdain for another's action  (see also: やがる; after the -masu stem of a verb; often written with kana only; regional dialect: Kansai-ben)
'ru' godan verb, intransitive verb
7. to lose a bet  (archaic)
8. to be drenched; to become sopping wet  (archaic)
My mastery:
My current mastery of 腐る:
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My flashcards:
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Usefulness and usage:
Kanshudo usefulness level: 4 (among the 5,000 most useful words in Japanese)
• Kanshudo usefulness level is based on a usefulness score of 108,709 which gives a rank of 3,920
腐る is the most useful form. 1 additional form is shown below.
This word is a member of our collection of the 10,000 most useful words in Japanese:
• This form is almost always used
• Google Japan frequency rank: 71,000 (about 4,460,000 results)
• This form appears in Wikipedia's list of JLPT N3 vocabulary (see JLPT collections)
• iknow! Core 6000 rank: 1340 (see iKnow! collections)
• Wikipedia most common 20000 words rank: 11817
• This form appears in the 1998 'Ichimango goi bunruishuu' frequent word list by Senmon Kyouiku
• This form appears in the 24,000 words in the Mainichi Shimbun frequency analysis by Alexandre Girardi
• This form is in band 36 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
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Example sentences:
あつ
ミルク
くさ

The hot weather turns milk.
かれ
はら
そこ
まで
くさ
った
やつ
He is a thoroughly dishonest character.
かご
なか
バナナ
はんぶん
半分
くさ
っていた

Half of the bananas in the basket were rotten.
くさる
BOOST
My flashcards:
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Usefulness and usage:
• This form is rarely used
• Google Japan frequency rank: 205,000 (about 223,000 results)
• This form appears in the 1998 'Ichimango goi bunruishuu' frequent word list by Senmon Kyouiku
• This form appears in the 24,000 words in the Mainichi Shimbun frequency analysis by Alexandre Girardi
• This form is in band 36 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
VIEW INFLECTIONS
フ   くさ    くさらす    くされる to go bad   
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ニク   meat
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ナイ   ダイ   うち inside   
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wide
ジン   ニン   ひと person   
フ    borough   
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フ   つける to put in place, affix   つ to adhere to   
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スン   inch
ジン   ニン   ひと man   
广
stony cliff
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