The magnificent Rampling has the gravitas and the poker face necessary to pull off the mysterious role.
Some staffers say the campaign is in desperate need of someone with the stature and gravitas to force Romney to listen.
“Gore has gravitas with people who already agree with him,” says Levi.
1924, from Latin gravitas "weight, heaviness;" figuratively, of persons, "dignity, presence, influence" (see gravity). A word that became useful when gravity acquired a primarily scientific meaning.