- -less suffix meaning "lacking, cannot be, does not," from O.E. -leas, from leas "free (from), devoid (of), false, feigned," from P.Gmc. *lausaz (Cf. Du. -loos, Ger. -los "-less," O.N. lauss "loose, free, vacant, dissolute," M.Du. los, Ger. los "loose, free," Goth. laus "empty, vain"). Related to LOOSE (Cf. loose) and LEASE (Cf. lease).
Etymology dictionary. 2014.