boundary / limit

(tree) + (the number 9) + (ten)
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8 strokes
SOLO

Onyomi

Mnemonic

You got the 9 radical, and the 10 radical, so think '90'. As in, You're limited to cutting down 90 trees within the boundary of the forest.

Kunyomi

わく literally, a frame (write you name in this box, etc.). More often used figuratively, a numerical limit: you can use this library card 3 times a month. You can only bring 5 friends with you to the pool. Etc.
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Synonyms

limit
枠    限界    制限