Prefix
| Root Word | Prefix | Opposite Word |
|---|---|---|
| favourable | un | unfavourable |
| fit | un | unfit |
| grateful | un | ungrateful |
| happy | un | unhappy |
| healthy | un | unhealthy |
| important | un | unimportant |
| impressive | un | unimpressive |
| lock | un | unlock |
| lucky | un | unlucky |
| natural | un | unnatural |
| Root Word | Prefix | Opposite Word |