Gravitas is a serious dignity that commands respect. Lack gravitas, bring gravitas to the role, a certain gravitas.
It is borrowed straight from Latin and kept its Latin form, which suits a word about weight of character. It is most often used of people in public life, and most often to say that somebody has none.
1noungravitasA serious dignity that commands respect.
“The new chairman brought a gravitas the board had been missing.”
gravitas is a quality.
Latin gravitas means weight or heaviness, from gravis, heavy; it is a doublet of gravity.
Proto-Indo-European
*gʷreh₂-
Latin
gravitās
English, today
gravitas
Borrowed from Latin gravitās. Latin gravitās (“weight, heaviness”). a doublet of gravity.
Etymology from Wiktionary, CC BY-SA