隧道 suìdào HSK7 tunnel Origin Definitions Defs Strokes Stroke Words Sentences Sents suìdào tunnel · tunnel-like structure 隧 suì noun tunnel (bound form) an underground passage or tunnel道 dào noun channel channel; conduit; passage (e.g. for water, air, or biological fluids)suìdào tomb passage 隧 suì grave path a passage or path leading to a tomb道 dào noun channel channel; conduit; passage (e.g. for water, air, or biological fluids)