1A treasure — something highly valued and precious, such as a valuable object, or figuratively a cherished person or thing that cannot be replaced.
海賊たちは島のどこかに宝が眠っていると信じていた。
The pirates believed that treasure lay hidden somewhere on the island.
祖母の指輪は私にとって何よりの宝だ。
My grandmother's ring is my most precious treasure.
子どもは国の宝だとよく言われる。
It's often said that children are the treasure of a nation.