1. Situated at or extending to great depth; too deep to have been sounded or plumbed
   "unplumbed depths of the sea"
   - profound, unfathomed, unsounded

See also: deep

• showy sunflower
• shrapnel
• shred
• shredded
• shredder
• Shreveport
• shrew
• shrew mole
• shrew-sized
• shrewd
• shrewdly
• shrewdness
• shrewish
• shrewishly
• shrewishness
• shrewmouse
• shriek
• shrieked
• shrieking
• shrieval
• shrievalty
• shrieve
• shrift
• shrike
• shrill