HSK 3
可
kě连（副）
(prefix) can; may; able to; -able; to approve; to permit; to suit; (particle used for emphasis) certainly; very
今天的风可大了，别出门。
Jīn tiān de fēng kě dà le, bié chū mén.
The wind is really strong today, so do not go out.
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Appears across levels (3（5）) in the HSK 3.0 word list.