heaviness

the property of being comparatively great in weight; "the heaviness of lead"

persisting sadness; "nothing lifted the heaviness of her heart after her loss"

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"

used of a line or mark

unwelcome burdensome difficulty