You may say "kiretsu."
A crevice is a narrow crack or opening, a fissure or cleft.
Another word for crevice is crack.
It is a crevice
black crack
It is a crevice
crevice
Incorrect. A crevice is a narrow opening or crack in a structure, such as a wall, whereas a keyhole is a small hole designed for inserting a key.
A crevice
Crevice, fissure
black crack
it is crack,cleft, crevice, fissure, chap
A crevice is smaller than a cave. I would go with "black crack."