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 as a verb. As a verb, diffuse means to spread something out, but also applies to spreading things such as ideas or culture so that they become widely known. When something is diffused, it's mixed in, and when you drop propaganda pamphlets out of airplanes you're diffusing the propaganda.

Understanding the Context

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. 1. Widely spread or scattered; not concentrated: Diffuse light is often hard to read by.

Key Insights

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 Adjective diffuse (comparative more diffuse, superlative most diffuse) Everywhere or throughout everything; not focused or concentrated. 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.

Final Thoughts

Physics to spread out freely without restriction; Everywhere or throughout everything; not focused or concentrated. Such a diffuse effort is unlikely to produce good results.