Antonyms are words that are opposite in meaning. For the word "rough spot," some antonyms could be smooth sail, easy street, or clear path. These words denote a sense of ease, comfort, and simplicity, which is the complete opposite to the meaning of the word rough spot. Instead of toughness, these antonyms suggest a period of tranquility, comfort, and fewer obstacles. The use of antonyms helps to clarify and expand the meaning of words, providing readers with a broadened understanding of the language. By familiarizing ourselves with antonyms, we can create a diverse and comprehensive vocabulary, which is essential for effective communication.