Antonyms of adj rigorous

2 senses of rigorous

Sense 1
rigorous, strict -- (rigidly accurate; allowing no deviation from a standard; "rigorous application of the law"; "a strict vegetarian")

INDIRECT (VIA exact) -> inexact -- (not exact)

Sense 2
rigorous, stringent, tight -- (demanding strict attention to rules and procedures; "rigorous discipline"; "tight security"; "stringent safety measures")

INDIRECT (VIA demanding) -> undemanding -- (requiring little if any patience or effort or skill; "the pay was adequate and the job undemanding"; "simple undemanding affection"; "an undemanding boss")

Similarity of adj rigorous

2 senses of rigorous

Sense 1
rigorous, strict -- (rigidly accurate; allowing no deviation from a standard; "rigorous application of the law"; "a strict vegetarian")
       => exact (vs. inexact) -- (marked by strict and particular and complete accordance with fact; "an exact mind"; "an exact copy"; "hit the exact center of the target")

Sense 2
rigorous, stringent, tight -- (demanding strict attention to rules and procedures; "rigorous discipline"; "tight security"; "stringent safety measures")
       => demanding (vs. undemanding) -- (requiring more than usually expected or thought due; especially great patience and effort and skill; "found the job very demanding"; "a baby can be so demanding")