slit, crack, aperture, hole, gap
Glen is the word for a long, narrow valley. It traces its origin to 15th century Scottish Gaelic word Gleann.
crack
A door is an opening.
Slim.
pit
Chanelled into a narrow opening.
slit
wide
A crevice is a narrow crack or opening, a fissure or cleft.
The word that describes a narrow gap in a rock is "crevice." A crevice is typically a narrow opening or fissure formed by the natural processes of weathering and erosion in the rock. It can serve as a habitat for various organisms or as a pathway for water and other elements.
Slot
The pharynx is the narrow opening at the back of the mouth. It is part of both the digestive system and the respiratory system.
spinal cord
Noun: # A narrow cut or opening; a slot. # (vulgar, slang) The opening of the vagina. # (vulgar, slang) A derogatory name for a woman, usually a sexually loose woman; a prostitute. Verb: # To cut a narrow opening. #: He slit the bag open and the rice began pouring out. # To split in two parts. It is also the word for "wear" in the Icelandic language.
Yes, waves can bend as they pass through a narrow opening. This phenomenon is known as diffraction. The degree of bending depends on the wavelength of the wave and the size of the opening.
crack!
The Mediterranean