Too large or extensive to measure.

अति विशाल

English Usage: Her generosity was immeasurable.

Hindi Usage: उसकी उदारता अति विशाल थी।

The quality of being immense; greatness in size or extent.

विशालता

English Usage: The immensity of the universe is hard to comprehend.

Hindi Usage: ब्रह्मांड की विशालता को समझना कठिन है।