cune-, cuneo-, cunei- +

(Latin: wedge, wedge shaped)

coin (noun); coin, coins, coining, coined (verb forms)
1. A flat round piece of metal with special designs on it, authorized by a government to be used as money.
2. Usually a circular flat piece of metal stamped with its value as money.
3. Money in the form of coins rather than paper bills or checks.
4. To devise or to use a word or phrase that no one has used before; that is, to coin a phrase to coin a new word.
5. Etymology: from about 1300, "a wedge", from Old French coing (12th century), "a wedge, a stamp, a piece of money; a corner, an angle"; from Latin cuneus, "a wedge".

The die for stamping metal was wedge-shaped, and the English word came to mean "a thing stamped, a piece of money" by the late 14th century. The verb meaning "to coin money" is from the mid-14th century and "to coin a phrase", is from the late 16th century.

cuneal
Wedge-shaped or shaped like a wedge.
cuneate
Wedge-shaped, a reference especially to describe a leaf or petal base that is narrowly triangular.
cuneiform
1. With the narrowly triangular shape of a wedge.
2. Being a character, or characters, formed by the arrangement of small wedge-shaped elements and used in ancient Sumerian, Akkadian, Assyrian, Babylonian, and Persian writing.
3. A description of the clay tablets on which cuneiform script was written.
4. A description of any of three wedge-shaped bones of the ankle.
5. A wedge-shaped bone, especially one of three such bones in the tarsus of the foot.
cuneocuboid
Referring to the cuneiform and cuboid bones.
cuneus
Any shape that is triangular in cross section: a wedge, wedge shaped, triangle, trigon, trilateral.
entocuneiform
1. Wedge-shaped.
2. An ancient wedge-shaped script formed by the arrangement of small wedge-shaped elements (letters) and used in ancient Sumerian, Akkadian, Assyrian, Babylonian, and Persian writing.
3. Anatomy, relating to, or being a wedge-shaped bone or cartilage or relating to the tarsal bones (or other wedge-shaped bones).
quoin, coign
1. An exterior angle of a wall or other piece of masonry.
2. Any of the stones used in forming such an angle, often being of large size and dressed or arranged so as to form a decorative contrast with the adjoining walls.
3. A stone block used to form a quoin, especially when it is different; such as, in size, texture, or material, from the other blocks or bricks that are used to build the wall.
4. Etymology: "a cornerstone", a variant of coin; originally, in other senses of that word, too, including "a wedge"; from Old French coing (12th century), "a wedge; stamp; piece of money; corner, angle"; from Latin cuneus, "a wedge".

The die for stamping metal was wedge-shaped, and the English word came to mean "thing stamped, a piece of money" by the late 14th century.

In Modern French, coin is "a corner, an angle", or "a nook" (interior angle formed between two meeting walls or a small corner or sheltered space).