demeanor

A person's outward manner or behaviour; the way someone appears to others.

• (related: demean /dɪˈmiːn/ v — to lower in dignity — different word)

• calm demeanor
• professional demeanor
• friendly demeanor
• change in demeanor
• outward demeanor

1. 1.Despite the chaos around her, she maintained a calm, composed demeanor throughout the emergency. (outward manner)
2. 2.His cold demeanor made it difficult for colleagues to approach him. (behavioral manner)

• manner/ˈmænər/— the way a person behaves — more common
• bearing/ˈbɛərɪŋ/— the way someone holds or conducts themselves — more physical
• comportment/kəmˈpɔːrtmənt/— behaviour — more formal

from Old French "demener" (to lead, conduct) — de- (completely) + mener (to lead) — how one conducts oneself