弱 (ruò) means “weak; feeble; young; inferior; not as good as; (following a decimal or fraction) slightly less than”. It is an HSK 5 Chinese character in the HSK 3.0 vocabulary.
他的身体还很弱,需要休息。
Tā de shēntǐ hái hěn ruò, xūyào xiūxi.
His body is still weak and needs rest.
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