permafrost /pûrˈmə-frost/

Permanently frozen subsoil

• fission-track dating
• fissiparism
• fissiparisms
• fissiparities
• fissiparity
• fissiparous
• fissiparously
• fissiparousness
• fissiparousnesses
• fissiped
• fissipede
• fissipedes
• fissipeds
• fissirostral
• fissive
• fissle
• fissled
• fissles
• fissling
• fissure
• fissured
• fissures
• fissuring
• fist
• fist bump