Diffuse is commonly found used as both adjective ("not concentrated or localized") and verb ("to pour out and permit or cause to spread freely," "to scatter"), while infuse is almost entirely restricted to use …

DIFFUSE definition: to pour out and spread, as a fluid. See examples of diffuse used in a sentence.

1. Widely spread or scattered; not concentrated: Diffuse light is often hard to read by. 2. Wordy or unclear: a diffuse description. See Synonyms at wordy.

diffuse adjective (SPREAD) spread out and not directed in one place: a diffuse light

If you describe something as diffuse, you mean that it is vague and difficult to understand or explain. His writing is diffuse and it is difficult to make out what he is trying to say.

Diffuse means to spread out. Candlelight can diffuse a soft glow throughout a room. A diffuse idea is one that spreads from person to person, and a diffuse speech is scattered and unclear.

to (cause to) spread or scatter widely: [no object] The light diffused into the room.[~ + object] Diffuse the light in your room to avoid glare. Physics to spread out freely without restriction;