IPA: /ˈfʊli/
KK: /ˈfʊli/
In a complete or total way; to the greatest extent possible.
She fully understood the instructions before starting the project.
Fully → It is formed from "full" (from Old English "full", meaning complete or filled) and the suffix "-ly" (meaning in a manner of). The word "fully" means in a complete manner or to the fullest extent.
Think of being 'complete' ('full') and doing something 'in that manner' ('-ly'). This helps you remember that 'fully' means to do something in a complete way.