IPA: /ˈvɜːtɪkəlnəs/
KK: /ˈvɜrtɪkəlnəs/
The quality or state of being upright or perpendicular to the ground.
The verticalness of the building made it stand out in the skyline.
Verticalness → It is formed from "vertical" (from Latin "verticalis", meaning perpendicular or upright) and "-ness" (a suffix indicating a state or quality). The word "verticalness" refers to the quality or state of being vertical or upright.
Think of the word 'vertical' which means upright, and remember that 'verticalness' describes the quality of being upright.