This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Simple past tense and past participle of infiltrate.

"Last year, representatives from several indie music labels infiltrated a private BitTorrent tracker with the aim of gathering information on both users and admins and using that data to force it to close down."

infiltrated    infiltrates    infiltrating   

go across    go through    pass    get together    join   

infiltrated    infiltrating    infiltrative    infiltration    infiltrator   

exude    pervade