HSK 7-9
翘
qiào动
to stick up; to rise on one end; to tilt
木板一端受潮后翘了起来。
Mùbǎn yì duān shòucháo hòu qiào le qǐlái.
One end of the wooden board warped upward after getting damp.
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Also free:
Appears across levels (7-9) in the HSK 3.0 word list.