aplomb

/ə-ˈpläm/

French, literally, perpendicularity, from Middle French, from a plomb, literally, according to the plummet

noun

  1. complete and confident composure or self-assurance : poise

She played several roles with equal aplomb.

confidence assurance self-possession aplomb mean a state of mind or a manner marked by easy coolness and freedom from uncertainty, diffidence, or embarrassment. confidence stresses faith in oneself and one's powers without any suggestion of conceit or arrogance. assurance carries a stronger implication of certainty and may suggest arrogance or lack of objectivity in assessing one's own powers.