1. adjective /ɪnˈtɛnsɪv/
She was moved to the intensive care unit of the hospital.
b) Demanding, requiring a great amount.
Secondly, I continue to base my concepts on intensive study of a limited suite of collections, rather than superficial study of every packet that comes to hand.
See Also: intense
2. noun /ɪnˈtɛnsɪv/
Wikipedia foundation.