埋まい没ぼつ原げん価かMeaningsNoun1. sunk costKanji used埋to fill up (a hole)没go under原original価valueComposed of埋まい没ぼつbeing buried; remaining unknown; being forgotten; being absorbed (e.g. in research); being immersedNoun原げん価かcost price; purchase price; cost; production cost; manufacturing cost; prime costNoun