Non-gradable words are those that cannot be compared, intensified or diminished. These words express an absolute quality that cannot be measured on a scale. Synonyms for non-gradable include absolute, definite, invariant, and unconditional. They are often used to describe characteristics that are not relative, subjective or debatable. Other synonyms for non-gradable include unalterable, fixed, steadfast, and unwavering. When it comes to emotions, non-gradable words such as love, hate, fear, and joy are absolute and cannot be measured or compared. Non-gradable words also express binary opposition such as always, never, unique, or perfect. These words are necessary in language to express certainty, truth, and clarity.