1. Difficult or impossible to extinguish
   "an inextinguishable flame"; "an inextinguishable faith"

Antonym: extinguishable

• built-soap powder
• built-up
• buirdly
• Bujumbura
• Bukharin
• bukkake
• Bulawayo
• bulb
• bulb-shaped
• bulbaceous
• bulbar
• bulbar conjunctiva
• bulbed
• bulbil
• bulblet
• bulblet bladder fern
• bulblet fern
• bulblike
• bulbourethral gland
• bulbous
• bulbous iris
• bulbous plant
• bulbul
• Bulgaria
• Bulgarian