harden in Korean is 굳히다. For examples, you can use like [석고를 굳히다, 시멘트를 굳히다]. In this post you will learn how to pronounce and use 굳히다 along with examples.
Basics
| Word | Part | Chinese | Sound |
| 굳히다 | verb | — | 구치다 |
굳히다 Meaning
| Meaning | Explanation |
| harden; make hard | To make a soft thing hard or stiff. |
How to Conjugate 굳히다
① Formal High (합니다체)
| Present |  굳힙니다 |
| Past | 굳혔습니다 |
| Past Perfect | 굳혔었습니다 |
| Future | 굳힐 것입니다 |
| Condition | 굳히겠습니다 |
② Informal High (해요체)
| Present | 굳혀요 |
| Past | 굳혔어요 |
| Past Perfect | 굳혔었어요 |
| Future | 굳힐 것이에요 |
| Condition | 굳히겠어요 |
③ Informal Low (해체)
| Present | 굳혀 |
| Past | 굳혔어 |
| Past Perfect | 굳혔었어 |
| Future | 굳힐 것이야 |
| Condition | 굳히겠어 |
④ Formal Low (한다체)
| Present | 굳힌다 |
| Past | 굳혔다 |
| Past Perfect | 굳혔었다 |
| Future | 굳힐 것이다 |
| Condition | 굳히겠다 |
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