| Word | Reading | Meaning |
| 水垢 | みずあか | scale;《英》 fur |
| ボイラーに水あかがたまった Scale has formed in the boiler. やかんの水あかを落とした I scrubbed [scraped] the mineral deposit out of the kettle. |
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| Word | Reading | Meaning |
| 水垢 | みずあか | scale;《英》 fur |
| ボイラーに水あかがたまった Scale has formed in the boiler. やかんの水あかを落とした I scrubbed [scraped] the mineral deposit out of the kettle. |