HSK 7-9
机灵
jīling形
clever; quick-witted
机灵小狗自己打开院门。
Jī ling xiǎo gǒu zì jǐ dǎ kāi yuàn mén.
The clever dog opened the courtyard gate by itself.
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Appears across levels (7-9) in the HSK 3.0 word list.