1590s, literally "to throw a card away," from dis- "away" + card (n.). Figurative use (in a non-gaming sense) is first recorded 1580s. In the card-playing sense, decard is attested by 1550s. Related: Discarded; discarding. As a noun, from 1742.
例文
1. Einstein had the chutzpah to discard common sense and long-established theory.
アインシュタインは常識と長期的に公認された理論を捨てる勇気があった。
2.Clean the mussels and discard any that do not close.
ムール貝をきれいに洗って、口に合わないものはすべて捨てます。/
3. Discard the bacon rind and cut each rasher in half.
燻製肉の外皮を取り除き、燻製肉を1枚ずつ半分に切る。
4.Cut the flesh from the olives and discard the stones.