weighty

weighty is an   Adverb

Definition:

[1] Having weight; heavy; ponderous; as, a weighty body.

[2] Adapted to turn the balance in the mind, or to convince; important; forcible; serious; momentous. "For sundry weighty reasons." Shak. Let me have your advice in a weighty affair. Swift.

[3] Rigorous; severe; afflictive. [R.] "Attend our weightier judgment." Shak.

Synonyms: