Senses
沟/ 溝 ditch
ditch; gutter; trench; channel for irrigation or drainage
沟/ 溝 groove
groove; furrow; rut; any long and narrow shallow depression
沟/ 溝 ravine
gully; ravine; valley or low land between mountains
沟/ 溝 to dig out
(literary) to dig a ditch; to dredge; to clear a watercourse
沟/ 溝 defensive trench
trench or ditch dug for defensive purposes, such as a moat or communication trench