infiltration
noun/ɪnfɪlˈtreɪʃən/
Frequency rank: #10,181 most common English word
Meaning
the act of secretly entering or gaining access to an organization or place.

Example sentence
The spy's infiltration into the enemy base went undetected for several weeks.
Synonyms & related words
Practice this word in the quiz
More words in ranks 10,101–10,200
- grassyCovered with or resembling grass; having a lot of grass.
- hangera shaped frame, usually with a hook, used to hang clothes.
- hemto fold and sew the edge of a piece of cloth to finish it neatly.
- hitmana person who is paid to murder someone; a professional killer.
- housekeepingthe work of cleaning and maintaining a house or hotel, or routine tasks that keep a system running smoothly.
- insidiousProceeding in a gradual, subtle way but with harmful effects.
- intimatelyin a very close, detailed, or thorough manner
- jargonspecialized words or expressions used by a particular group or profession.
- kayaka small, narrow boat propelled by a double-bladed paddle.
- kneelto go down on one or both knees.