"interpenetrate" in the verb sense
1. interpenetrate, permeate
penetrate mutually or be interlocked
"The territories of two married people interpenetrate a lot"
2. permeate, pervade, penetrate, interpenetrate, diffuse, imbue, riddle
spread or diffuse through
"An atmosphere of distrust has permeated this administration"
"music penetrated the entire building"
"His campaign was riddled with accusations and personal attacks"
Source: WordNet® (An amazing lexical database of English)
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