oštar

1. (of a blade) sharp
   Pazi, nož je veoma oštar. — Careful, the knife is very sharp.
   Ove makaze nisu dovoljno oštre. — These scissors aren't sharp enough.
2. (of pain, wind, smell) sharp; biting; intense
   Osetio sam oštar bol u leđima. — I felt a sharp pain in my back.
   Duvao je oštar, hladan vetar. — A biting cold wind was blowing.
3. (of words, people, measures) harsh; severe; strict
   Ministar je dobio oštre kritike. — The minister received harsh criticism.
   Profesor je bio oštar prema studentima. — The professor was strict with the students.
4. (of mind, eyesight, hearing) sharp; keen
   Ima oštar um i brzo shvata. — He has a sharp mind and catches on quickly.
   Moja baka još ima oštro oko. — My grandmother still has a keen eye.
5. (of an image, boundary) sharp; clear; distinct
   Slika na novom televizoru je veoma oštra. — The picture on the new TV is very sharp.
   Između ta dva pojma postoji oštra granica. — There is a clear line between those two concepts.
6. (of an angle, turn) sharp; acute
   Posle mosta je oštra krivina. — There's a sharp bend after the bridge.
   Oštar ugao je manji od devedeset stepeni. — An acute angle is less than ninety degrees.

For spicy food Serbian usually uses ljut, not oštar.