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

• devoutly
• devoutness
• deVries
• dew
• dew point
• dew worm
• Dewar
• Dewar flask
• dewberry
• dewberry bush
• dewclaw
• dewdrop
• Dewey
• Dewey decimal classification
• Dewey decimal system
• Deweyan
• dewfall
• dewiness
• DeWitt Clinton
• dewlap
• dewy
• dewy-eyed
• dexamethasone
• Dexamethasone Intensol
• Dexedrine