Commanding and Arch

commanding

Be in command of.
- usage: "The general commanded a huge army"
- synonyms: command
Make someone do something.
- synonyms: command, require
Demand as one's due.
- usage: "This speaker commands a high fee"; "The author commands a fair hearing from his readers"
- synonyms: command
Look down on.
- usage: "The villa dominates the town"
- synonyms: dominate, command, overlook, overtop
Exercise authoritative control or power over.
- usage: "control the budget"; "Command the military forces"
- synonyms: control, command

Used of a height or viewpoint.
- usage: "a commanding view of the ocean"; "looked up at the castle dominating the countryside"; "the balcony overlooking the ballroom"
- synonyms: dominating, overlooking

(a.) Fitted to impress or control; as, a commanding look or presence.
(a.) Exercising authority; actually in command; as, a commanding officer.
(a.) Exalted; overlooking; having superior strategic advantages; as, a commanding position.
(p.pr.&vb.n.) of Command.

Webster's Revised Unabridged Dictionary

arch

A curved shape in the vertical plane that spans an opening.
A curved bony structure supporting or enclosing organs (especially the inner sides of the feet. )
A passageway under a curved masonry construction.
- usage: "they built a triumphal arch to memorialize their victory"
- synonyms: archway
Architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it. (

Form an arch or curve.
- usage: "her back arches"; "her hips curve nicely"
- synonyms: curve, arc

Used of behavior or attitude. ( characteristic of those who treat others with condescension)
- synonyms: condescending, patronizing, patronising
Expert in skulduggery.
- usage: "an arch criminal"
Naughtily or annoyingly playful.
- usage: "teasing and worrying with impish laughter"; "a wicked prank"
- synonyms: impish, implike, mischievous, pixilated, prankish, puckish, wicked

(n.) A flat arch is a member constructed of stones cut into wedges or other shapes so as to support each other without rising in a curve.
(v.t.) To form or bend into the shape of an arch.
(n.) A chief.
(v.i.) To form into an arch; to curve.
(n.) Any part of a curved line.
(n.) Any place covered by an arch; an archway; as, to pass into the arch of a bridge.
(a.) Cunning or sly; sportively mischievous; roguish; as, an arch look, word, lad.
(v.t.) To cover with an arch or arches.
(a.) Chief; eminent; greatest; principal.
(n.) Usually a curved member made up of separate wedge-shaped solids, with the joints between them disposed in the direction of the radii of the curve; used to support the wall or other weight above an opening. In this sense arches are segmental, round (i. e., semicircular) or pointed.
(n.) Any curvature in the form of an arch; as, the arch of the aorta.

Webster's Revised Unabridged Dictionary

Arch is a masculine given name

ARCH is Autoregressive Conditional Heteroskedasticity. It is a time series approach that models volatility as function of previous returns.