arete
A five-letter word for "narrow mountain stream" is "brook".
A narrow gap in a mountain range is called a pass or a mountain pass.
A row or chain of mountains is called a mountain range.
Pass
A row or chain of mountains ranged in a line is called a mountain range. A narrow gap through a mountain range is a mountain pass.
Narrow is the opposite of wide. It begins with the letter N.
They're called Fjords. (pronounced fee-ords)
Pass
A narrow opening between hills or mountains is referred to as a "pass" or a "mountain pass." These pathways provide a route through mountainous terrain, allowing for travel between two areas that may otherwise be difficult to access. Passes can vary in width and difficulty depending on the specific terrain features.
Thermopylae
This is because it is a narrow boat
surefooted is a word to describe a person or animal that is steady on their feet. For instance, Mountain Goats are often called surefooted due to their ability to climb and jump around on narrow mountain ledges without falling.