ok and ok

When you tell a friend everything's OK, you say "okay."

When you tell a kid it's time to go, you say, "Okay, time to go."

But when you try to get a kid to abide by an instruction, you say, "o-khoay?".

Most adults who do this even use two different Ks. Arabs would use different letters: The dark K of "Iraq," as opposed to the shallow frontal K of "Kuwait."