1. Not growing old; not appearing to age
   - ageless, unaging

Encyclopedia: Unageing

• fire-bellied toad
• fire-bush
• fire-eater
• fire-on-the-mountain
• fire-raiser
• fire-raising
• fire-resistant
• fire-resisting
• fire-resistive
• fire-retardant
• fire-swallower
• fire-wheel
• fire-worship
• firearm
• fireball
• firebase
• firebird
• fireboat
• firebomb
• firebox
• firebrand
• firebrat
• firebreak
• firebrick
• firebug