* Formal: "The antonym of 'hot' is 'cold'."
* Informal: "I couldn't remember the word, so I just used its antonym instead."
* With a specific example: "The antonym of 'happy' is 'sad', which can be seen in the contrasting emotions they represent."
* In a literary context: "The author used the antonym of 'light' to create a sense of darkness and mystery."
* With an explanation: "While 'good' and 'bad' are often seen as antonyms, they can also be complex concepts with nuances that go beyond simple opposites."
Remember, "antonym" refers to a word with the opposite meaning. You can use it to discuss language, writing, or even to clarify your own understanding of a concept.