1. Not capable of being changed or altered
   - unalterable

See also: final, incurable, last

• skyjacker
• Skylab
• skylark
• skylight
• skyline
• skype
• skyrocket
• skysail
• skyscraper
• skywalk
• skyward
• skywards
• skyway
• skywriter
• skywriting
• SL
• slab
• slabber
• slabbing
• slack
• slack off
• slack suit
• slack tide
• slack up
• slack water