Regular transitive verb; can also take legal sense in US usage.
Definitions
To decorate or embellish food or drink by adding small items such as herbs, fruit, or other condiments. Garnish the soup with a sprinkle of chopped chives before serving.
Law. To seize money or property, especially wages, by legal authority in order to satisfy a debt or claim. The court ordered the employer to garnish his wages until the judgment was paid.
Figurative. To embellish or adorn something, such as a story or statement, with decorative or excessive details. She likes to garnish her anecdotes with dramatic pauses and vivid imagery.