Select the most appropriate ANTONYM of the given word.

Obvious

Hidden

The most appropriate antonym of the word obvious is hidden.

• Obvious means "easily perceived or understood; clear or apparent."
• Hidden means "not visible or apparent; concealed."

The other words do not have the same meaning as obvious, so they are not its antonyms.

• Plain means "clear and simple; not elaborate or ornate."
• Vapid means "lacking interest or excitement; dull or boring."
• Active means "engaged in or characterized by vigorous activity."