a. 尖锐的, 敏锐的, 激烈的, 严重的, 急性的

[医] 急性的; 尖锐的

Acute \A*cute"\, v. t.
To give an acute sound to; as, he acutes his rising
inflection too much. [R.] --Walker.


Acute \A*cute"\, a. [L. acutus, p. p. of acuere to sharpen, fr.
a root ak to be sharp. Cf. {Ague}, {Cute}, {Edge}.]
1. Sharp at the end; ending in a sharp point; pointed; --
opposed to {blunt} or {obtuse}; as, an acute angle; an
acute leaf.

2. Having nice discernment; perceiving or using minute
distinctions; penetrating; clever; shrewd; -- opposed to
{dull} or {stupid}; as, an acute observer; acute remarks,
or reasoning.

3. Having nice or quick sensibility; susceptible to slight
impressions; acting keenly on the senses; sharp; keen;
intense; as, a man of acute eyesight, hearing, or feeling;
acute pain or pleasure.

4. High, or shrill, in respect to some other sound; --
opposed to {grave} or {low}; as, an acute tone or accent.

5. (Med.) Attended with symptoms of some degree of severity,
and coming speedily to a crisis; -- opposed to {chronic};
as, an acute disease.

{Acute angle} (Geom.), an angle less than a right angle.

Syn: Subtile; ingenious; sharp; keen; penetrating; sagacious;
sharp-witted; shrewd; discerning; discriminating. See
{Subtile}.