Eternity
The eternity radical and the eternity kanji are the same!
Know your radicals, yo!
えい
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How long is an eternity? Just look at this little acorn (えい) and ask. The acorn starts small but it grows into a huge tree and can live for all eternity by dropping more acorns to create more trees. Its acorn line will live on forever!
It's the miracle of eternal life!