Antonyms for the phrase "is pleased by" could be numerous, depending on the context. Opposite words for the verb "pleased" could be "displeased," "unhappy," "uncomfortable," "displeased," or "upset." On the other hand, synonyms for the word "pleased" could include "delighted," "content," "satisfied," "jubilant," "overjoyed," or "ecstatic." It is essential to understand that antonyms for "is pleased by" can change based on the context, and one should be careful to use the appropriate word. For instance, if someone is displeased by something, it could be uncomfortable, frustrating, or even infuriating, making it crucial to find the right antonym.