IPA: /dɪˈpɔːtmənt/
KK: /dɪˈpɔrtmənt/
The way a person behaves or carries themselves in public.
Her deportment during the ceremony was graceful and confident.
Deportment → It is formed from "de-" (meaning down or away) and "portare" (meaning to carry). The word refers to the manner in which one carries oneself or behaves, essentially meaning to carry oneself in a certain way.
Think of how someone 'carries' themselves ('portare') in their behavior or manners, with 'de-' suggesting a certain way of doing it.