Components
老化 is an exact match with one form of the following word:
老化
BOOST
Reading : ろうか   
ageing; aging; senile deterioration
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My current mastery of 老化:
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My flashcards:
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Usefulness and usage:
Kanshudo usefulness level: 6 (among the 15,000 most useful words in Japanese)
• Kanshudo usefulness level is based on a usefulness score of 77,958 which gives a rank of 9,399
老化 is the most useful form. 1 additional form is shown below.
• This form is used about 90% of the time
• Google Japan frequency rank: 15,000 (about 45,200,000 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 15 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:
かくだい
拡大
けいざい
経済
ろうか
老化
している

The expansion is aging.
ろうか
老化
げんしょう
現象
いっしゅ
一種
です
This is a condition caused by aging.
ろうか
老化
ふせ
ためにもっと
からだ
うご
かす
べき
You have to get more exercise in order to stave off senility.
ろうか
BOOST
My flashcards:
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Usefulness and usage:
• This form is used about 10% of the time
• Google Japan frequency rank: 66,000 (about 5,240,000 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 15 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
VIEW INFLECTIONS
ロウ   old   おいる    ふける to grow old   
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old
さじ spoon   
カ   ケ   ばける to change   
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ジン   ニン   ひと man   
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