HSK 7-9
开阔
kāikuò形动
wide; open (spaces); to open up
登上山顶视野顿时开阔起来。
Dēng shàng shān dǐng shì yě dùn shí kāi kuò qǐ lai.
The view opened up immediately upon reaching the summit.
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Appears across levels (7-9) in the HSK 3.0 word list.