I'm having difficulty coming up with a valid antonym for gravitas.
Online searches return results like superficiality, cheerfulness, frivolity, facetiousness etc. which don't work for me. They seem to be opposites of gravitas as it is understood by the person who has it.
As in, "We need to undertake this project with gravitas", "he carried himself with gravitas".
This is taken to mean seriousness.
There's another sense of the word, as the quality of a person having gravitas. In this case, the things they say and do are given significance because of gravitas.
What if what someone has to say is automatically disregarded because of... the opposite of gravitas.
What would that word be?