I. ˈskī-ˈhī adverb
Date: 1818
1.
a. : high into the air
b. : to a high or exorbitant level or degree
lifted my spirit sky-high — Elmer Morriss
2. : in an enthusiastic manner
3. : to bits : apart
blown sky-high
II. adjective
Date: 1945
1. : excessively expensive : exorbitant
2. : extremely or excessively high
her blood pressure was sky-high