Permeate

1. verb

   penetrate mutually or be interlocked

   “The territories of two married people interpenetrate a lot”

   Similar: interpenetrate

2. verb

   spread or diffuse through

   “An atmosphere of distrust has permeated this administration”

   Similar: pervade, penetrate, interpenetrate, diffuse, imbue, riddle

3. verb

   pass through

   “Water permeates sand easily”

   Similar: percolate, sink in, filter