1. So thin as to transmit light
   - diaphanous, filmy, gauzy, gossamer, see-through, sheer, transparent, vaporous, vapourous [Brit, non-standard], cobwebby, vapory [US], vapoury [Brit, Cdn]

See also: thin

• suntrap
• sunup
• sunward
• suo moto
• Suomi
• sup
• super
• super acid
• Super Bowl
• super C
• super heavyweight
• super-duper
• superable
• superabound
• superabundance
• superabundant
• superadd
• superaddition
• superannuate
• superannuated
• superannuation
• superannuation fund
• superb
• superbia
• superbly