noun
unused possession; something going to waste
Refers to an item, skill, or resource that is owned but not utilized, often implying it is being wasted. Frequently used in the phrase 宝の持ち腐れ (a treasure going to waste).
彼は才能があるのに使わないから、宝の持ち腐れだ。
He has talent but doesn't use it, so it's a treasure going to waste.
高いカメラ
I bought an expensive camera, but I hardly use it and it's just sitting there unused.