demeanor
UK: dɪˈmiːnə | US: dɪˈmiːnər
n. the way a person behaves, dresses, or speaks, which reflects their character or attitude
The word "demeanor" originates from Middle English demenen (to conduct oneself), derived from Old French demener (to guide, manage), which combines the prefix de- (completely) and mener (to lead). The root mean relates to behavior or conduct, while -or is a noun-forming suffix. Over time, "demeanor" evolved to specifically describe outward behavior or bearing, reflecting one's character.
Her calm demeanor under pressure impressed the interviewers.
The teacher’s stern demeanor kept the class disciplined.
Despite his friendly demeanor, he was a very private person.
The suspect’s nervous demeanor aroused the officer’s suspicion.
A professional demeanor is essential in customer service roles.