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Phrase(s): infiltrate into something
1. to permeate something; to filter into something. • The sour smell infiltrated into everything in the refrigerator. • The paint smell infiltrated into every room in the house. 2. and infiltrate something to penetrate a group, secretly, for the purposes of spying or influencing the activities of the group. • The spy infiltrated into the enemy headquarters. • They infiltrated into the government.
McGrawhill's American Idioms And Phrasal Verbs