definition of
ponderousness

[1] #1 ponderousness n. [heaviness] an oppressive quality that is laborious and solemn and lacks grace or fluency; "a book so serious that it sometimes subsided into ponderousness"; "his lectures tend to heaviness and repetition". wn

[2] #2 ponderousness n. [heft, heftiness, massiveness, ponderosity] the property of being large in mass. wn