Definition

The most irritable or bad-tempered person or thing.

Example

He was the grumpiest person at the party, always complaining about something.

Comparatives & Superlatives

Conversation

Have you noticed how he's the grumpiest person in the office lately?

Yeah, I saw him snap at someone over a small mistake.

I wonder what's bothering him so much these days.

Maybe he just needs a vacation to lighten his mood.

Synonyms & Antonyms

Root Explanation

Grumpiest is formed from "grump" (of uncertain origin, possibly imitative of a grumbling sound) and the suffix "-iest" (meaning most). The word "grumpiest" describes someone who is in the state of being the most grumpy or irritable.

Memory Tip

Think of someone who is making a grumbling sound, which helps you remember that 'grumpiest' means the most irritable or grumpy.

Visually Confused Words