Components
気づく is an exact match with one form of the following word:
気付く
BOOST
Reading : きづく   
'ku' godan verb, intransitive verb
to notice; to recognize; to recognise; to become aware of; to perceive; to realize; to realise
My mastery:
My current mastery of 気付く:
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My flashcards:
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Usefulness and usage:
Kanshudo usefulness level: 3 (among the 3,000 most useful words in Japanese)
• Kanshudo usefulness level is based on a usefulness score of 136,753 which gives a rank of 1,585
気付く is the most useful form. 2 additional forms are shown below.
This word is a member of our collection of the 10,000 most useful words in Japanese:
• This form is used about 30% of the time
• Google Japan frequency rank: 48,000 (about 10,100,000 results)
• This form appears in Wikipedia's list of JLPT N3 vocabulary (see JLPT collections)
• iknow! Core 6000 rank: 1399 (see iKnow! collections)
• Wikipedia most common 20000 words rank: 5452
• 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 31 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:
かれ
じぶん
自分
じしん
自身
かしつ
過失
きづ
気付
いていない

He is not conscious of his own faults.
かのじょ
彼女
ドア
ける
まで
さむ
きづ
気付
いてなかった

She hadn't noticed the cold until she opened the door.
ども
いちにち
一日
せんかい
千回
ちが
きづ
気付

He notices a thousand times a day the difference.
気づく
BOOST
Reading : きづく   
My flashcards:
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Usefulness and usage:
• This form is used about 60% of the time
• Google Japan frequency rank: 31,000 (about 18,900,000 results)
• Wikipedia most common 20000 words rank: 5061
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きづく
BOOST
My flashcards:
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Usefulness and usage:
• This form is rarely used
• Google Japan frequency rank: 212,000 (about 174,000 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 31 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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キ   ケ    spirit   
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イチ   イツ   ひと    ひと- one   
ジン   ニン   ひと man   
second   おつ    
crossed swords
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   
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