noun
comportment
kum-PORT-munt/kəmˈpɔːrtmənt/
A person's manner of behavior and bodily bearing.
The seated man shows composed comportment, sitting upright beside his slouching companion.

Etymology
The Latin elements mean 'carry together,' while the French verb developed the sense 'behave.' The English noun names a person's bearing, in posture as well as conduct.
In context
through equitable comportment with members of diverse religious communities the saint removed partisanship and promoted social harmony
More examples
- The judge expects respectful comportment from everyone in the courtroom.
- Ballet training improved her posture and overall comportment.
- Even during heated disagreements, his comportment remains calm and courteous.
Forms
comportment
comport verb — to conduct oneself in a particular way