Definition

Very irritable or easily annoyed; the most irritable or easily annoyed.

Example

After a long day at work, he was the testiest he had ever been.

Comparatives & Superlatives

Conversation

I think you were the testiest person in the meeting today.

Yeah, I was a bit on edge with all those last-minute changes.

It's understandable, but maybe try to relax next time?

Definitely! I’ll work on that for sure.

Synonyms & Antonyms

Root Explanation

Testiest → It is formed from "testy" (from Middle English *testi*, meaning irritable or peevish) and the suffix "-est" (indicating the superlative degree). The word "testiest" means the most irritable or easily annoyed.

Memory Tip

Think of someone who is the 'most irritable' — 'testy' describes being easily annoyed, and '-est' shows it's the highest degree of that quality.

Visually Confused Words