What is the opposite of 'gravitas'?

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?

Solution 1:

You could try levity:

Levity may refer to

a sense of amusement, the opposite of gravitas

Solution 2:

There is nothing wrong with the word Frivolity as you pointed out. It actually means- lack of seriousness. The word Frivolity, from Latin frivolus. It is a synonym to levity and it is directly opposite to the word serious.

Frivolity (noun): the quality or state of being frivolous.

Merriam-Webster defines frivolous (adj.) as,

https://www.merriam-webster.com/dictionary/frivolous

2.a: lacking in seriousness

His frequent frivolous behavior in the meeting is a big concern.

Solution 3:

Flippancy, perhaps?

Flippant - Displaying unbecoming levity in the consideration of serious subjects or in behaviour to persons entitled to respect. (OED)

Solution 4:

I generally agree that levity is a pretty direct antonym of gravitas, but "he carried himself with levity" doesn't sound right. So I'll suggest

insouciance n. Blithe lack of concern; nonchalance.

Solution 5:

What about apathy?

absence or suppression of passion, emotion, or excitement.

lack of interest in or concern for things that others find moving or exciting.