intensive

nouns

a modifier that has little meaning except to intensify the meaning it modifies
"`up' in `finished up' is an intensifier"; "`honestly' in `I honestly don't know' is an intensifier"

adjectives

characterized by a high degree or intensity; often used as a combining form
"the questioning was intensive"; "intensive care"; "research-intensive"; "a labor-intensive industry"
is derived from
is similar to
possessing or displaying a distinctive feature to a heightened degree
"intense heat"; "intense anxiety"; "intense desire"; "intense emotion"; "the skunk's intense acrid odor"; "intense pain"; "enemy fire was intense"
tending to give force or emphasis
"an intensive adverb"
pertains to
of agriculture; intended to increase productivity of a fixed area by expending more capital and labor
"intensive agriculture"; "intensive conditions"
is derived from
antonym