Today's kanji 171 ja. A which is
A kanji which is read as "hebi or ja" and has a radical or bushu called "mushihen" which means "insect"
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either pronunciation means "snake or serpent"
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"hebi" is a "kun-yomi" meaning a kun-reading
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"ja" is a "on-yomi" meaning an on-reading
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For more information about this kanji, see here :
https://en.wiktionary.org/wiki/蛇. A which is