青

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blue

On-Yomi: セイ、ショウ — Kun-Yomi: あお、あお-、あお.い

Koohii stories:

1) [mhheie] 6-2-2008(147): "Once in a blue moon" refers to a rare event. But originally "blue moon" refers to a full moon, in other words a fully grown-up moon. Whether once a month is rare or not depends on what we're talking about, but that happens to be the origin of the expression.

2) [dingomick] 4-3-2007(104): The last time I saw a blue moon was in my youth when I was growing up.

3) [scottamus] 19-6-2006(40): Blue = Smurfs, whose bodies never grow up.

4) [akrodha] 17-5-2007(34): They say that as the sun gets older, it grows up and becomes red. However, that's not the case for the moon, which turns blue as it grows up.

5) [skinnyneo] 26-3-2008(22): Once in a Blue moon you can see Peter Pan flying high above it.

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