hi, hie, high

Hi or hi is an informal greeting, like "hello"--
Hi! How are you?
He didn't even say "hi". He must be angry.

Hie or hie ( rhymes with hi ) is an old-fashioned word meaning to hurry or to move in haste--
Hie ye to yon tavern for a tankard of ale.
Tell him to hie to the market for a peck of potatoes.

High or high ( rhymes with hi ) means tall or at an elevation,  literally or figuratively--
There is a house high on the top of that hill.
She always had trouble with the high note at the end.

Now that you know that, you can say--
"Hi! Shall we hie to yon theater and sit high in the balcony?"