Adjective: 1. (of a person) Surprised and confused so much that they are unsure how to react.
2. (of a person) Unperturbed.
One is always describing the nature of others.
You have heard the expressions “powder-keg.” “makes coffee nervous,” and “cool as a cucumber.”
Add NON-PLUSSED to your word base.
This is an excellent choice for describing a persona who is a stoic.
Things can be chaotic all around them, but they maintain their equanimity.
Who comes to mind?