acute

acute

adjective acer, acuminate, alert, apt, astute, aware, clear-sighted, critical, crucial, cutting, fine, foreseeing, intense, intuitive, keen, keenly sensitive, knowledgeable, penetrating, perceptive, piercing, pointed, prompt, provident, prudent, quick-witted, sagax, sapient, sharp, sharp-edged, sharp-witted, trenchant, vivid

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See also: artful, caustic, conscious, critical, crucial, exigent, important, incisive, intense, intensive, knowing, mordacious, perceptive, politic, profound, responsive, sapient, trenchant, urgent