a·plomb 
(ə-plŏm, ə-plŭm)
(ə-plŏm, ə-plŭm)n.
Self-confident assurance; poise: "It is native personality ... that endows a man to stand before presidents or generals ... with aplomb" (Walt Whitman).
[French, from Old French a plomb, perpendicularly : a, according to (from Latin ad-; see AD-) + plomb, lead weight (from Latin plumbum, lead).]
- high-def
- high definition
- high-definition
- high-density lipoprotein
- high-density polyethylene
- high-end
- high-energy
- higher critic
- higher criticism
- higher education
- higher law
- higher learning
- higher-up
- highest common factor
- high explosive
- highfalutin
- highfaluting
- high fashion
- high fidelity
- high-fidelity
- high finance
- high-five
- highflier
- high-flier
- high-flown