再 zài
adverb
: again; once more
: re-; second; another
: then (after something, and not until then)
 
Kun Reading
再び | ふたたび futatabi
adverb
: again; once more; a second time
 
On Reading
再 | さい sai
prefix
: re-; again; repeated; deutero-; deuto-; deuter-
 
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