Opportunity cost (机会成本 jīhuì chéngběn) refers to the loss or cost from giving up an alternative opportunity when one plan is chosen.
- 机 (jī) as in machine (机器 jīqì), mobile phone (手机 shǒujī) or airplane (飞机 fēijī); 会 (huì) as in meeting (会议 huìyì), society (社会 shèhuì) or appointment (约会 yuēhuì). 机会 (jīhuì) means oppurtunity.
- 成 (chéng) as in succeeding (成功 chénggōng), become (成为 chéngwéi) or growing up (成长 chéngzhǎng); 本 (běn) as in original (本来 běnlái). 成本 (chéngběn) means cost, as in fixed cost (不变成本 búbiàn chéngběn).