impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch"
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"
of agriculture; intended to increase productivity of a fixed area by expending more capital and labor; "intensive agriculture"; "intensive conditions"
tending to give force or emphasis; "an intensive adverb"