1. Such as can be breathed

Encyclopedia: Breathable

• Sc
• scab
• scabbard
• scabbed
• scabbiness
• scabby
• scabicide
• scabies
• scabiosa
• Scabiosa arvensis
• Scabiosa atropurpurea
• scabious
• scablands
• scabrous
• scad
• scads
• scaffold
• scaffolding
• scag
• scagliola
• scala
• scalability
• scalable
• scalage
• scalar