IPA: /ˈɡræsɪli/
KK: /ˈgræsɪli/
In a manner that is characteristic of grass or grassy areas.
The meadow was grassily adorned with wildflowers and tall blades of grass.
Grassily → It is formed from "grass" (from Old English *græs*, meaning a type of vegetation) and "-ily" (a suffix meaning in a manner of). The word "grassily" means in a manner that is characteristic of or resembling grass.
Think of the word 'grass' to remember that 'grassily' describes something that is in a manner like grass.