is "arch" a suffix, root, or prefix word?

Answer 1

"Arch" can function as a root or a prefix word, depending on the context.

As a root word, "arch" means chief, principal, or topmost. Examples of words that use "arch" as a root include "architect" (chief builder), "archenemy" (chief enemy), and "archbishop" (the chief bishop).

As a prefix, "arch-" means superior, chief, or main. It can modify a word to indicate preeminence or superiority. For example, "archrival" (main rival), "archduke" (chief duke), or "archangel" (principal angel).