crater

The word 'crater' entered English in the early 17th century via Latin 'crātēr', which was borrowed directly from the Greek 'kratēr'. In ancient Greece, a kratēr was a specific type of large, deep bowl used for diluting wine with water. This literal sense of a deep, bowl-shaped vessel was later adopted by astronomers in the 18th century to describe the bowl-shaped depressions observed on the surface of the moon. The logic of the term's evolution is clear: the shared visual characteristic of a deep, rounded hollow allowed the meaning to extend seamlessly from a man-made mixing vessel to a natural geological or astronomical feature. The modern meanings related to explosions and meteorite impacts are further semantic extensions based on this same core concept of a bowl-shaped cavity.

Structure: crat (vessel, mixing bowl) + er (noun suffix, agent or thing) 'crat' is from the Greek 'kratēr', meaning a large bowl for mixing wine and water. '-er' is an English agentive suffix, often used to form nouns denoting a person or thing that performs an action or has a particular characteristic.