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to go under; to pass under; to go through; to pass through
to dive (into or under the water)
to evade; to get around; to slip past
to survive; to surmount
門をくぐると美しい日本庭園が広がっていた。
A beautiful Japanese garden spread out after passing through the gate.
彼は数々の困難をくぐり抜けて成功した。
He succeeded after going through many difficulties.
トンネルをくぐって反対側に出てきた。
I passed through the tunnel and came out on the other side.