Definition of "unfamiliar with" []

• Having little or no knowledge of (adjective)

WordNet. Princeton University. 2010.

• "With the “Doomsday Defense” unfamiliar with the pressure of stopping a team when it mattered most, the Green Bay Packers drove 68 heart-stopping yards, winning the game 21-17 with 16 seconds left on a dramatic one-yard quarterback sneak by Bart Starr."
• "Mr. Donaldson was perhaps unfamiliar with the lowly status of children like us."
• "From the use of mercury or fluoride in dentristry to the use of toxic products by your manicurist, we are talking about people who are actually unfamiliar with large bodies of compelling research."