Con‐jec″ture, v. t. [imp. & p. p.Conjectured (?); p. pr. & vb. n.Conjecturing.] [Cf. F. conjecturer. Cf. Conject.] To arrive at by conjecture; to infer on slight evidence; to surmise; to guess; to form, at random, opinions concerning.
Human reason can then, at the best, but conjecture what will be.
South.