फ़्लैशकार्ड

An ergative verb operates in two active patterns. In the transitive pattern, a person, tool, or natural force acts on an object, causing a transformation. In the intransitive pattern, the item undergoing the transformation serves as the grammatical subject, and no object follows. The verb does not require a passive structure or a reflexive pronoun to show that the action occurred.

The morning sun melted the frost on the kitchen window.