缺口 quēkǒu nick
nick; jag; gap; shortfall
How to remember 缺口: 缺 lack + 口 mouth (Kangxi radical 30) = nick.
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How it is used
- A 'gap/breach', literal or figurative - 城墙的缺口 (chéngqiáng de quēkǒu) a breach in the wall; 资金缺口 (zījīn quēkǒu) a funding shortfall.
- The figurative 'shortfall' sense (money, supply, manpower) is very common in economics and planning.
- Neutral register; a hole where something is missing.