1.
Intensive activity involves concentrating a lot of effort or people on one particular task in order to try to achieve a great deal in a short time.
...several days and nights of ~ negotiations...
ADJ: usu ADJ n
~ly
Ruth’s parents opted to educate her ~ly at home.
ADV: ADV with v
2.
Intensive farming involves producing as many crops or animals as possible from your land, usually with the aid of chemicals.
...~ methods of rearing poultry.
ADJ: usu ADJ n
~ly
Will they farm the rest of their land less ~ly?
ADV: ADV with v