highness
//ˈhaɪnəs//
Noun
highnessSingular
highnessesPlural
1
A title of honor given to royalty, especially princes and princesses (used with His, Her, Your, or Their).
Her Royal Highness will attend the ceremony tomorrow.
2
The state or quality of being high; elevation or loftiness.
The highness of the mountain made it difficult to climb.