noun
immensity
ih-MEN-suh-tee/ɪˈmensəti/
The quality of being extremely large or great.
The tiny hiker at its base emphasizes the sequoia's immensity.

Etymology
The negative measuring base and noun ending name the quality of being beyond measure. The resulting idea of immeasurableness or infinity also serves to describe extremely great size, scale, or extent.
In context
I should point out that in view of the immensity of the territory and populations involved, to pick out a credible frontier through the maze of small communities should take several years.
More examples
- The immensity of the task calls for a larger team.
- She struggles to grasp the immensity of her loss.
- We stare in silence at the immensity of the desert.
Forms
immensity
immense adjective — Extremely large in size or degree.
immensely adverb — To an extremely great degree.
Similar words
- vastness
- Stresses great extent, especially across large, open spaces.
- magnitude
- Describes size or degree without necessarily implying extreme greatness.