Main entry: nonindulgent, strict
Definition: characterized by strictness, severity, or restraint
Antonyms: indulgent
Definition: characterized by or given to yielding to the wishes of someone
Main entry: strict, hard-and-fast
Definition: (of rules) stringently enforced
Usage: hard-and-fast rules
Antonyms: variable
Definition: liable to or capable of change
Main entry: rigorous, strict
Definition: rigidly accurate; allowing no deviation from a standard
Usage: rigorous application of the law; a strict vegetarian
Antonyms: inexact
Definition: not exact
Main entry: rigid, strict
Definition: incapable of compromise or flexibility
Antonyms: tolerant
Definition: showing respect for the rights or opinions or practices of others
Main entry: stern, strict, exacting
Definition: severe and unremitting in making demands
Usage: an exacting instructor; a stern disciplinarian; strict standards
Antonyms: undemanding
Definition: requiring little if any patience or effort or skill