intransitive verb
Definition: To fall into a state of destruction or disrepair.
Example: The old castle began to ruin after years of neglect.
noun
Definition: A state of complete destruction or the remains of something that has been destroyed, often referring to buildings or structures that are no longer intact.
Example: The ancient ruins of the castle attracted many tourists.
transitive verb
Definition: To cause something to be destroyed or to be in a state of disrepair, often beyond repair.
Example: The heavy rain could ruin the picnic plans we made for Saturday.