IPA: /ˈpætʃ.ɪ.li/
KK: /ˈpætʃɪli/
In a way that is uneven or irregular, often with some areas being better or more complete than others.
The paint was applied patchily, leaving some spots untouched.
Patchily → It is formed from "patch" (from Middle English *pacche*, meaning a piece or a small area) and "-ily" (a suffix forming adverbs, meaning in a manner). The word "patchily" means in a manner that is characterized by patches or unevenness.
Think of a 'patch' as a small area or piece, and remember that 'patchily' describes something that happens in a way that is uneven or in pieces.