An atmosphere of distrust has permeated this administration. Music penetrated the entire building. His campaign was riddled with accusations and personal attacks.
source: WordNet 3.0
pass through
Water permeates sand easily.
source: WordNet 3.0
penetrate mutually or be interlocked
The territories of two married people interpenetrate a lot.
source: WordNet 3.0
To pass through the pores or interstices of; to penetrate and pass through without causing rupture or displacement; -- applied especially to fluids which pass through substances of loose texture; as, water permeates sand.