heaviness
  重;重量;累贅;悲衷
  Heav·i·ness, n. The state or quality of being heavy in its various senses; weight; sadness; sluggishness; oppression; thickness.
  ◄ ►
  heaviness
       n 1: the property of being comparatively great in weight; "the
            heaviness of lead" [syn: weightiness] [ant: lightness]
       2: used of a line or mark [syn: thickness]