Less (l&ebreve_;s), conj. Unless. [Obs.] B. Jonson.
[1913 Webster]

Less, adv. [AS. l&aemacr_;s. See Less, adj., and cf. Lest.] Not so much; in a smaller or lower degree; as, less bright or loud; less beautiful.
[1913 Webster]

Less, v. t. To make less; to lessen. [Obs.] Gower.
[1913 Webster]