Unbuttoned (adjective)

Not fastened or secured with a button or button-like device.

Origin:

The word "unbuttoned" is formed by the prefix "un-" meaning "not" or "reverse of" and the verb "buttoned" meaning "to fasten or secure with a button or button-like device" . it is used to indicate that something is not fastened or secured with a button or button-like device.

Examples:

1. His shirt was unbuttoned and his tie was loose.
2. She wore an unbuttoned blouse with a tank top underneath.
3. He unbuttoned his jacket and sat down.
4. She unbuttoned her dress to change.
5. He unbuttoned his pants before sitting down.