Meaning: To complain in a low, unhappy voice

Memory Trick: Your tummy making a grumpy sound when you’re hungry, that’s a grumble, just like your voice when you’re annoyed.

Behind the Word:

This word mimics the sound it describes! First used in the 1500s, grumble is a sound-word for low, rumbling complaints—like thunder, or a kid whining under their breath.