I don’t know the answer but if I have to take a guess. It indicates that these kanji forms are rarely used in real life.
Hello, I’m native-japanese and will answer. This “X” means “Is this a common-use kanji or not?” or “Is it a recognized reading in the list of common-use kanji readings or not?”
In a typical Kanji dictionary, common-use Kanji characters are left unmarked, while non-common-use Kanji characters are marked with an “×” or another symbol.
In some of Japanese words, there is a kanji that basically applies to the word, but there are cases where the meaning is not used in everyday life. In this case, ” かしましい” is usually used in hiragana in Japan. However, of course, there is a Kanji that fits the word, so the Kanji is marked with a “X”.
In short, it means that this Xis not used in daily life and is better suited for use in hiragana.
I am not sure if I am answering properly because I am not good at English, but if you have any questions about any part of the question, please let me know.
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I don’t know the answer but if I have to take a guess. It indicates that these kanji forms are rarely used in real life.
Hello, I’m native-japanese and will answer.
This “X” means “Is this a common-use kanji or not?” or “Is it a recognized reading in the list of common-use kanji readings or not?”
In a typical Kanji dictionary, common-use Kanji characters are left unmarked, while non-common-use Kanji characters are marked with an “×” or another symbol.
In some of Japanese words, there is a kanji that basically applies to the word, but there are cases where the meaning is not used in everyday life. In this case, ” かしましい” is usually used in hiragana in Japan. However, of course, there is a Kanji that fits the word, so the Kanji is marked with a “X”.
In short, it means that this Xis not used in daily life and is better suited for use in hiragana.
I am not sure if I am answering properly because I am not good at English, but if you have any questions about any part of the question, please let me know.
https://dictionary.sanseido-publ.co.jp/column/kok_nyumon29