隧道
also: ずいどう · ついどう
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Meanings
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Literary or technical term for 'tunnel'; in modern Japanese, トンネル is overwhelmingly more common. 隧道 may appear in historical contexts, engineering documents, or proper names.
See also: トンネル
This old tunnel is no longer in use.
The word 隧道 is an old way of saying 'tunnel'.