infiltrate

/ˈɪnfɪltreɪt/ verb [T]

Definition

› to secretly join a group or organization so that you can learn more about them: A journalist managed to infiltrate the gang of drug dealers.

infiltration

/ˌɪnfɪlˈtreɪʃən/ noun [C, U] infiltrator noun [C]

(Definition of infiltrate verb from the Cambridge Learner's Dictionary © Cambridge University Press)

to express disagreement or refuse to do something

Read our blog about how the English language behaves.

Find words and meanings that have just started to be used in English, and let us know what you think of them.