Unimpeded passage all the way; smooth sailing without obstacles.
毫无阻碍地通行或通过。
毛泽东《整顿党的作风》铲除这两方面的祸根，才能使党在团结全党同志和团结全国人民的伟大事业中畅行无阻。”
With the new highway, travel between the two cities is now畅通无阻.
Learn the next connected idiom: 畅通无阻 (chàng tōng wú zǔ) → 足不出户 (zú bù chū hù)
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