戒 (jiè) means “to guard against; to exhort; to admonish or warn; to give up or stop doing sth; Buddhist monastic discipline; ring (for a finger)”. It is an HSK 5 Chinese character in the HSK 3.0 vocabulary.
医生建议他戒烟戒酒。
Yīshēng jiànyì tā jiè yān jiè jiǔ.
The doctor advised him to quit smoking and drinking.
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