IPA: /ˈʃæloʊli/
KK: /ˈʃæloʊli/
In a way that is not deep; lacking depth or seriousness.
The water was so shallowly that I could see the bottom clearly.
Shallowly → It is formed from "shallow" (from Old English *sceald*, meaning not deep) and "-ly" (meaning in a manner of). The word "shallowly" means in a manner that is not deep.
Think of something that is 'not deep' ('shallow') and how it is done 'in a manner' ('-ly'). This helps you remember that 'shallowly' describes doing something in a way that lacks depth.