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

See also: deep

• Syrian hamster
• Syrian monetary unit
• Syrian pound
• syringa
• Syringa amurensis japonica
• Syringa emodi
• Syringa josikaea
• Syringa josikea
• Syringa persica
• Syringa reticulata
• Syringa villosa
• Syringa vulgaris
• syringe
• syrinx
• Syrrhaptes
• Syrrhaptes paradoxus
• syrup
• syrupy
• sysadmin
• sysop
• systaltic
• system
• system administrator
• system call
• system clock