acute

о́стрый

Intense; sensitive; sharp

• He has an acute sense of observation.

  Tatoeba · sacredceltic · CC BY 2.0 FR

• An acute angle is less than a right angle.

  Острый угол меньше прямого угла.

  Tatoeba · DJ_Saidez · CC BY 2.0 FR

о́стрый

Brief, quick, short

о́стрый

High or shrill

о́стрый

Urgent

о́стрый

Of an abnormal condition of recent or sudden onset, in contrast to delayed onset; this sense does not imply severity, unlike the common usage

о́стрый

Of a short-lived condition, in contrast to a chronic condition; this sense also does not imply severity

о́стрый

With the sides meeting directly to form an acute angle (at an apex or base)редкое

о́стрый

Less than 90 degreesредкое

о́стрый

Having all three interior angles measuring less than 90 degreesредкое

о́стрый

Of an accent or tone: generally higher than othersредкое