goguma = sweet potato

A traffic light flashes Go, a Goose charges off the line, and a baby cries Ma as the goose snatches her roasted Sweet Potato.

How to remember 고구마

Each sound in goguma has a picture. Put them together and you get the scene above.

고
go → Go

구
gu → Goose

마
ma → Ma

고구마예요.

Goguma yeyo.

It's a sweet potato.

Learn goguma in Korean lesson 3, free.