Choose the perfect synonym or antonym for the word Situated below the Earth's surface or done out of sight and in secret.
Underground
/ˌʌndəˈɡraʊnd/Synonyms:
Antonyms:
Examples:
The soldiers will discover the underground path.We are too far underground."Spike leads us through the winding tunnels of the secret underground.
Etymology:
Originating from the Middle English undergrund, combining under, meaning below, and ground, referring to the earth's surface.
Usage Statistics:
10 mentions per 1 million words 
Hint: Frequency according to COCA
Moderate
Hint: Frequency according to COCA
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