IPA: /ˈmaɪldli/
KK: /maɪldli/
In a way that is gentle or not strong; to a small extent.
She was mildly surprised by the news.
Mildly → It is formed from "mild" (from Old English *milde*, meaning gentle or moderate) and "-ly" (a suffix used to form adverbs). The word "mildly" means in a gentle or moderate manner.
Think of the word 'mild' meaning gentle or moderate, and remember that 'mildly' describes doing something in a gentle way.