IPA: /ˈlaɪtli/
KK: /ˈlaɪtli/
In a way that is not heavy or serious; gently or with little force.
She lightly touched the surface of the water with her fingers.
Lightly → It is formed from "light" (from Old English *leoht*, meaning not heavy or bright) and the suffix "-ly" (meaning in a manner of). The word "lightly" means in a manner that is not heavy or with little weight.
Think of something that is 'not heavy' ('light') and how it is done 'in a manner' ('-ly'). This helps you remember that 'lightly' means to do something in a gentle or easy way.