A crevice.
trench fosse
A long, narrow deep ditch.
A long narrow hole dug in the Earth is called a trench. Trenches are often created for various purposes such as construction, agriculture, or military purposes.
a three letter word
A long narrow region of land with water on each side is called and isthmus
A ditch is a narrow water channel. It begins with the letter d.
Fjords.
A trench made in the earth by digging, particularly a trench for draining wet land, for guarding or fencing inclosures, or for preventing an approach to a town or fortress. In the latter sense, it is called also a moat or a fosse., Any long, narrow receptacle for water on the surface of the earth., To dig a ditch or ditches in; to drain by a ditch or ditches; as, to ditch moist land., To surround with a ditch., To throw into a ditch; as, the engine was ditched and turned on its side., To dig a ditch or ditches.
A long narrow chain of hills and mountains is called a mountain range or a mountain chain.
a LONG NARROW CUT IS CALLED A SLIT. IT MEANS A LONG ROAD SPLIT IN 2.
fjord fjord
Skis