simpleness,
simplicity the quality of being simple or uncompounded; "the simplicity of a crystal"
simple unornamented; "a simple country schoolhouse"; "her black dress--simple to austerity"
complex complicated in structure; consisting of interconnected parts; "a complex set of variations based on a simple folk melody"; "a complex mass of diverse laws and customs"
quality an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare