Webster's Revised Unabridged Dictionary · 1913

Solve

Solve (solv) , transitive verb

[Latin solvere, solutum; from a prefix so- expressing separation (compare Sober) + luere to loosen; compare Old French soldre, soudre. See Loose, and compare Absolve.]

To explain; to resolve; to unfold; to clear up (what is obscure or difficult to be understood); to work out to a result or conclusion; as, to solve a doubt; to solve difficulties; to solve a problem.
True piety would effectually solve such scruples. — South
God shall solve the dark decrees of fate. — Tickell

Solve , noun

A solution; an explanation. [Obsolete] — Shakespeare