IPA: /ˈfɛrli/
KK: /ˈfɛrli/
To a moderate extent; more than a little but less than very.
The movie was fairly interesting, but it could have been better.
Fairly → It is formed from "fair" (from Old English *fæger*, meaning beautiful or pleasing) and "-ly" (meaning in a manner of). The word "fairly" means in a manner that is pleasing or just, often used to indicate a moderate degree.
Think of something that is 'pleasing' or 'beautiful' ('fair') and how it is done 'in a manner' ('-ly'). This helps you remember that 'fairly' means done in a pleasing or moderate way.