Short-tempered

TESTY

This word describes someone who's easily annoyed or irritable.

The clue "Short-tempered" hints at a word meaning easily irritated or impatient. "Testy" fits perfectly as it describes someone who gets annoyed quickly. There’s no wordplay here—it’s a straightforward definition where the answer directly matches the meaning of the clue. Think of someone who snaps easily, and "testy" is the word that comes to mind.