Exact historical dictionary sense
Simple in Webster's 1913 dictionary
The 1913 record labels simple as adjective. Its source-bounded etymology and selected historical definition appear below.
[F., fr. L. simplus, or simplex, gen. simplicis. The first part of the Latin words is probably akin to E. same, and the sense, one, one and the same; cf. L. semel once, singuli one to each, single. Cg. Single, a., Same, a., and for the last part of the word cf. Double, Complex.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "simple" is labeled adjective. Its etymology is recorded as: "[F., fr. L. simplus, or simplex, gen. simplicis. The first part of the Latin words is probably akin to E. same, and the sense, one, one and the same; cf. L. semel once, singuli one to each, single. Cg. Single, a., Same, a., and for the last part of the word cf. Double, Complex.]" The selected historical definition says: "Single; not complex; not infolded or entangled; uncombined; not compounded; not blended with something else; not complicated; as, a simple substance; a simple idea; a simple sound; a simple machine; a simple problem; simple tasks."