The term "uni vocal" refers to words that have a single meaning, which can make writing feel repetitive and dull. To avoid monotony, it is important to incorporate antonyms into your writing. Antonyms refer to words that have opposite meanings, which can add depth and complexity to your writing. For example, instead of using the uni vocal word "happy", consider using its antonyms such as "sad", "miserable", or "depressed". Similarly, you can replace the word "hot" with its antonyms "cold", "freezing", or "chilly". With the help of antonyms, you can make your writing more engaging, descriptive, and interesting to read.