Not aware or informed
Not the same as what was previously known or done
She stopped, unfamiliar with the sight of death.
He scowled at the other girls, and his voice had an unfamiliar edge.
At the unfamiliar voice, she faced the two men standing outside her kitchen.
Nearing the old house, she spotted an unfamiliar truck parked beside the road.
"Carmen?" an unfamiliar male voice asked.