WEIGHTY
corpulent, obese, weighty, rotund
(adjective) excessively fat; “a weighty man”
weighty
(adjective) having relatively great weight; heavy; “a weighty load”; “a weighty package”
weighty
(adjective) weighing heavily on the spirit; causing anxiety or worry; “weighty problems”
grave, grievous, heavy, weighty
(adjective) of great gravity or crucial import; requiring serious thought; “grave responsibilities”; “faced a grave decision in a time of crisis”; “a grievous fault”; “heavy matters of state”; “the weighty matters to be discussed at the peace conference”
cogent, telling, weighty
(adjective) powerfully persuasive; “a cogent argument”; “a telling presentation”; “a weighty argument”
Source: WordNet® 3.1
Etymology
Adjective
weighty (comparative weightier, superlative weightiest)
Heavy.
Important; serious; not trivial or petty.
Rigorous; severe; afflictive.
Source: Wiktionary
Weight"y, a. [Compar. Weightier; superl. Weightiest.]
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.
Syn.
– Heavy; ponderous; burdensome; onerous; forcible; momentous;
efficacious; impressive; cogent.
Source: Webster’s Unabridged Dictionary 1913 Edition