more rigorous

accurate brutal burdensome correct exacting harsh meticulous onerous precise proper rigid scrupulous strict stringent uncompromising

ascetic austere bitter definite dogmatic hard inclement inflexible intemperate ironhanded nice oppressive punctilious right rugged stern stiff unpermissive

careless easy false flexible gentle imprecise improper inaccurate incorrect inexact kind lenient negligent questionable soft tolerant unsuitable wrong yielding

easy-going lax loose mild