IPA: /dɪˈfjusi/
KK: /dɪˈfjusli/
In a way that spreads out or is not concentrated in one area.
The light from the lamp spread diffusely across the room, creating a soft glow.
Diffusely → It is formed from "diffusus" (from Latin, meaning spread out or scattered) and the adverbial suffix "-ly" (meaning in a manner of). The word "diffusely" means in a manner that is spread out or scattered.
Think of something that is 'spread out' ('diffusus') to remember that 'diffusely' means to do something in a scattered or spread-out manner.