IPA: /ˈfrɔːθɪli/
KK: /ˈfrɔːθɪli/
In a manner that produces or resembles froth, often light and bubbly.
The coffee was served frothily, with a thick layer of foam on top.
Frothily → It is formed from "froth" (from Old English *froþ*, meaning a bubbling or foam) and "-ily" (a suffix forming adverbs, meaning in a manner of). The word "frothily" means in a manner that produces or resembles froth or foam.
Think of something that is 'bubbling' or 'foamy' ('froth') and how it behaves 'in a manner' ('-ily'). This helps you remember that 'frothily' describes something that is foamy or bubbly in its action.