Fetching details from the dictionary...

ditch; drain; gutter; trench
groove; tread; indentation
gap (between people, countries, etc.); gulf; rift
道路脇の溝に落ち葉が詰まっていた。
The ditch on the roadside was clogged with fallen leaves.
二人の間にある溝は深くなる一方だ。
The gap between the two is only getting deeper.
溝が詰まってしまった。
The drain got clogged.