再 means 'again'

Animation / stroke order not available.
Strokes : 6    Frequency: 459   JLPT: N2    Usefulness: 4    Study set: 4-2    Grade: 5   Intermediate lesson: 37    Beginner lesson: -   Begins 286 words   Used in 316 words   Used in 37 names   Component in 15 kanji (4 Jōyō)
Jōyō (常用)
   サイ   サ
   ふたた again
Name    ふた
Lower element exists as rare kanji (red)
⿱   one   red  
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In the most useful 10,000 words in Japanese, 再 is used 13 times, read 3 ways.
Across all words in Japanese, 再 is used 313 times, read 3 ways.
サイ : 304 words FIND ALL
1. resuscitation; regeneration; restoration to life
2. reformation; rehabilitation
(click the word to view an additional 3 meanings, examples and links)
サ : 3 words FIND ALL
noun, adverb
year after next
(click the word to view an additional 2 forms, examples and links)
ふたた : 6 words FIND ALL
Most common form: 二度
again; once more; a second time
(click the word to view an additional 2 forms, examples and links)
An additional 更 less common words include 再 but the reading has not yet been categorized.
Henshall: 706 (originally: 679)  Joy o' Kanji : 679  Key to Kanji: 365 

Cascading kanji view

サイ   サ   ふたた again   
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