diffuse
verb
move outward
“The soldiers fanned out”
spread or diffuse through
“An atmosphere of distrust has permeated this administration”
“music penetrated the entire building”
cause to become widely known
“spread information”
“circulate a rumor”
adjective
spread out; not concentrated in one place
“a large diffuse organization”
(of light) transmitted from a broad light source or reflected
lacking conciseness
“a diffuse historical novel”
Source: WordNet 3.1, Princeton University