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"
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intense
in an extreme degree; "intense heat"; "intense anxiety,"; "intense desire"; "intense emotion"; "the skunk's intense acrid odor"; "intense pain"; "enemy fire was intense"
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deep
having great spatial extension or penetration; downward ("a deep well"; "a deep dive"; "deep water"; "a deep casserole"); or inward from an outer surface ("a deep gash"; "deep massage"; "deep pressure receptors in muscles"); or backward ("deep shelves"; "
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dangerous
causing fear or anxiety by threatening great harm; "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"