In the play, humor is often associated with the characters' emotions and states of mind. For example, when Romeo is in a state of despair after being banished from Verona, he is described as being "full of distemperature and mishaped humors". This means that his emotions are out of balance and that he is feeling mentally and emotionally unwell.
In other cases, humor can refer to a character's temperament or personality. For example, Mercutio is described as being "a man of humor", which means that he is known for his quick wit and intelligence.
Overall, the use of the word "humor" in Romeo and Juliet adds to the play's exploration of human emotion and behavior, and it helps to create a rich and nuanced understanding of the characters and their motivations.