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--- Transport
地下鉄 chikatetsu subway 鉄 [iron]  Ref. 地 [earth]
→ 発送 する hassō suru to ship Ref. 送 [send]
→ 輸送 する yusō suru to transport Ref. 輸 [transport]
空輸 kūyu air transport   Ref. 輸 [transport]
→ 運ぶ hakobu to transport Ref. 運 [transport]
運送 unsō shipping | transportation   Ref. 運 [transport]