1. Being or operating under the surface of the earth
   - subterranean 
2. Lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed)
   - subterranean, ulterior

See also: covert, subsurface

• Luyia
• Luzon
• lv
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• lwei
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• lxx
• lxxi
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• lxxvi
• lxxvii
• lxxviii