开水 kāishuǐ boiled water
boiled water; boiling water
How to remember 开水: 开 open + 水 water = boiled water.
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How it is used
- Boiled water (fully boiled, whether hot or cooled): 喝开水 (hē kāishuǐ) drink boiled water; 白开水 plain boiled water.
- Trap: it means water that has been boiled, not necessarily currently boiling; 凉开水 is cooled boiled water.
- Culturally, drinking 开水 (not raw tap water) is the norm.