momentousness

momentous +‎ -ness

• IPA^(key): /mə(ʊ)ˈmɛntəsnəs/

momentousness (uncountable)

1. The quality of being momentous.
   • 12 December 2018, Charles Bramesco, AV Club A spoonful of nostalgia helps the calculated Mary Poppins Returns go down

     There’s a scene near the end in which our ensemble receives some wholesome wisdom from a woman selling balloons in the park, portrayed by Angela Lansbury. Her presence and the momentousness appended to it make no sense, because this role was very clearly conceived for Julie Andrews, who wanted no part in all this.