Elementary (A2)
IPA: /ˈɡrʌmpɪnəs/
KK: /ˈɡrʌmpɪnəs/
Definition
The condition of being in a bad mood or feeling irritable.
Example
His grumpiness made it hard for others to approach him.
Conversation

I noticed you've been a bit off lately, is everything okay?

Yeah, I've just been feeling some grumpiness lately, nothing serious.

I get that; sometimes it's hard to shake off that mood.

True, but talking about it helps, thanks for asking!
Synonyms & Antonyms
Synonyms
surliness
irritability
moroseness
Antonyms
cheerfulness
happiness
contentment
Root Explanation
Grumpiness is formed from "grump" (of uncertain origin, possibly imitative of a grumbling sound) and "-iness" (a suffix meaning the state or quality of). The word describes the state of being grumpy or irritable.
Memory Tip
Think of the word 'grump' as a sound of irritation, and remember that 'grumpiness' refers to the state of being irritable.
Visually Confused Words
glumpiness
frumpiness
rumminess
lumpiness
jumpiness
humpiness
gumminess
griminess