mollayo = don't know

A Motorcycle crashes into a desk Lamp that tips into a pool of Lava, and its rider holds up a Yo-Yo with a shrug: I Don't Know.

How to remember 몰라요

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

몰
mo → Motorcycle

l → Lamp

라
la → Lava

요
yo → Yo-yo

미안해요, 몰라요.

Mianhaeyo, mollayo.

Sorry, I don't know.

Learn mollayo in Korean lesson 20, free.