worsen in Korean is 덧나다. For examples, you can use like [덧난 부위, 병이 덧나다]. In this post you will learn how to pronounce and use 덧나다 along with examples.
Basics
| Word | Part | Chinese | Sound |
| 덧나다 | verb | — | 던나다 |
덧나다 Meaning
| Meaning | Explanation |
| worsen | To handle a disease, injury, etc., in the wrong manner, so that its condition worsens. |
How to Conjugate 덧나다
① Formal High (합니다체)
| Present |  덧납니다 |
| Past | 덧났습니다 |
| Past Perfect | 덧났었습니다 |
| Future | 덧날 것입니다 |
| Condition | 덧나겠습니다 |
② Informal High (해요체)
| Present | 덧나요 |
| Past | 덧났어요 |
| Past Perfect | 덧났었어요 |
| Future | 덧날 것이에요 |
| Condition | 덧나겠어요 |
③ Informal Low (해체)
| Present | 덧나 |
| Past | 덧났어 |
| Past Perfect | 덧났었어 |
| Future | 덧날 것이야 |
| Condition | 덧나겠어 |
④ Formal Low (한다체)
| Present | 덧난다 |
| Past | 덧났다 |
| Past Perfect | 덧났었다 |
| Future | 덧날 것이다 |
| Condition | 덧나겠다 |
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