[Okay well first things first, Undyne is going to bring Break's hand up to his forehead so he can facepalm himself, because how exactly does he expect her to explain this when her methods are limited to vague writing and shoulder taps!!
But then she heaves out an enormous sigh and starts writing on his palm again. She starts with his right hand.]
no subject
But then she heaves out an enormous sigh and starts writing on his palm again. She starts with his right hand.]
h n y u
[Switches to his left.]
d e d
[Then back to his right.]
n e w
[And to his left again.]
d