cáo
to transport (esp. grain) by water
(literary) watercourse; canal
漕粮
cáo liáng
grain transported by water (in ancient times)
漕河
cáo hé
waterway used for the transportation of grain (in ancient times) (esp. the Grand Canal 大運河|大运河[Da4 Yun4 he2])
漕运
cáo yùn
(old) to transport by water