అర్థం : A feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it.
అర్థం : Unaffected by a designated operation or transformation.
అర్థం : Unvarying in nature.
							ఉదాహరణ : 
							Maintained a constant temperature.
							Principles of unvarying validity.
							
పర్యాయపదాలు : changeless, constant, unvarying