不ふ老ろう泉せんMeanings1nounfountain of youthMythological spring whose waters are said to grant eternal youth. Often used in legends, fantasy, and metaphorical contexts.伝でん説せつによると、不ふ老ろう泉せんの水みずを飲のめば永えい遠えんの若わかさを保たもてるという。According to legend, drinking the water of the fountain of youth keeps you young forever.