How to delete iPhone autocorrects?

A while ago while trying to type "night" I accidentally wrote Níght. Now every time I type night it autocorrects to the misspelled version. How do I reset this? I've tried reseting the keyboard and that didn't help. Any help would be appreciated.

1. Tap the "Settings" icon on the device's home screen, followed by the "General" option.

2. Tap the "Reset" option on the "General" settings screen to view the reset settings.

3. Tap the "Reset Keyboard Dictionary" option, followed by the "Reset Dictionary" option to reset the iPhone's auto-correct dictionary.