Components
再開 is an exact match with one form of the following word:
再開
BOOST
Reading : さいかい   
reopening; resumption; restarting
My mastery:
My current mastery of 再開:
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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 110,265 which gives a rank of 3,746
再開 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: 12,000 (about 56,300,000 results)
• iknow! Core 6000 rank: 5454 (see iKnow! collections)
• Wikipedia most common 20000 words rank: 2072
• 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 3 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:
わたし
たち
ゆうしょく
夕食
ちょくご
直後
それ
さいかい
再開
した

We started it again right after dinner.
しゅうかい
集会
なんじ
何時
さいかい
再開
する
あき
らか
でない
It is not clear when the meeting will open again.
あめ
んだ
のでゲーム
さいかい
再開
された

With the rain having stopped, the game began again.
さいかい
BOOST
My flashcards:
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Usefulness and usage:
• This form is rarely used
• Google Japan frequency rank: 150,000 (about 552,000 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 3 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
VIEW INFLECTIONS
サイ   サ   ふたた again   
カイ   あ to (be) open   あける    ひら to open (something)   ひらける to open out (eg view)   
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start, initiate   
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イチ   イツ   ひと    ひと- one   
twenty; two hands   
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ジュウ   ジッ   と    とお ten   
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stick   
モン   かど gate   
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