It's a question asking: "Is the boy lazy?"
Let's break it down:
This is really two words; est meaning is; and -ne which makes it a question (there was no question mark in Latin writing). It means "Is it?" Improved Answer: You're correct, -ne indicates a question. So if I were to ask, "Estne puer ignavus?" That would mean: Is the boy lazy?
Puer.
Puer.
Puer.
Boy.
Probably something along the lines of "mal puer" or "malus puer."
Puer salus
Puer bonus.
Malus puer
Pueri.
Pulcher puer
"Puer molestus."