to make something, usually food, by adding several different parts together, often in a way that is original or not planned

He concocted the most amazing dish from all sorts of leftover food. 他以各种剩余食材为原料配制成了一道美味佳肴。

to invent an excuse, explanation, or story in order to deceive someone

He concocted a story about working late at the office. 他编造谎言说他在办公室工作到很晚。