An antonym is a word that has the opposite meaning of another word. For example, hot and cold are antonyms, as are good and bad. Antonyms can be all types of words: verbs, nouns, adjectives, adverbs, and more. There are different types of antonyms, including:

• Gradable antonyms: These are word pairs whose meanings are opposite and which lie on a continuous spectrum, such as hot and cold).

• Complementary antonyms: These are word pairs whose meanings are opposite but whose meanings do not lie on a continuous spectrum, such as push and pull).

• Relational antonyms: These are word pairs where opposite makes sense only in the context of the relationship between the two meanings, such as teacher and pupil).

Antonyms are closely related to synonyms, which are words that have identical meanings. While antonyms have opposite meanings, synonyms have the same meaning. In English, antonyms are often used with prefixes that reverse a words meaning, turning it into its opposite.