治 (zhì) means “to rule; to govern; to manage; to control; to harness (a river); to treat (a disease); to wipe out (a pest); to punish; to research”. It is an HSK 4 Chinese character in the HSK 3.0 vocabulary.
医生正在给他治病。
Yīshēng zhèngzài gěi tā zhì bìng.
The doctor is treating his illness.
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