heaviness
hea-vi-ness
noun
The quality or state of being great in weight or difficult to lift.
"The heaviness of the box made it hard to move."
noun
A feeling of sadness, oppression, or emotional burden.
"A heaviness in her heart made her sigh."
Thesaurus
Synonyms: thickness, weightiness, burdensomeness, onerousness, oppressiveness, ponderousness
Antonyms: lightness, weightlessness