Is it ensure, insure, or assure?
late 13c., from Anglo-French archer, Old French archier "archer, bowmaker," from Latin arcarius, from arcus "bow" (see arc). Also a 17c. name for the bishop in chess.
1540s, "chief, principal," from prefix arch-; used in 12c. archangel, etc., but extended to so many derogatory uses (arch-rogue, arch-knave, etc.) that by mid-17c. it acquired a meaning of "roguish, mischievous," since softened to "saucy." Also found in archwife (late 14c.), variously defined as "a wife of a superior order" or "a dominating woman, virago."
early 14c., "to form an arch" (implied in arched); c.1400, "to furnish with an arch," from arch (n.). Related: Arching.
An organ or structure having a curved or bowlike appearance, especially either of two arched sections of the bony structure of the foot.
In architecture, a curved or pointed opening that spans a doorway, window, or other space.
Note: The form of arch used in building often serves to distinguish styles of architecture from one another. For example, Romanesque architecture usually employs a round arch, and Gothic architecture, a pointed arch.
a shooter with the bow (1 Chr. 10:3). This art was of high antiquity (Gen. 21:20; 27:3). Saul was wounded by the Philistine archers (1 Sam. 31:3). The phrase "breaking the bow" (Hos. 1:5; Jer. 49:35) is equivalent to taking away one's power, while "strengthening the bow" is a symbol of its increase (Gen. 49:24). The Persian archers were famous among the ancients (Isa. 13:18; Jer. 49:35; 50:9, 14, 29, 42. (See BOW ØT0000631).
an architectural term found only in Ezek. 40:16, 21, 22, 26, 29. There is no absolute proof that the Israelites employed arches in their buildings. The arch was employed in the building of the pyramids of Egypt. The oldest existing arch is at Thebes, and bears the date B.C. 1350. There are also still found the remains of an arch, known as Robinson's Arch, of the bridge connecting Zion and Moriah. (See TYROPOEON VALLEY.)