The antonym for the phrase "am effect" can be described as a negative outcome or lack of impact. Some potential antonyms for this phrase might include "ineffectiveness," "unproductiveness," or "failure." These words convey a sense of disappointment or frustration that the desired results have not been achieved. Conversely, antonyms for the phrase "am effect" might also include words like "success," "achievement," or "impact," which describe a positive outcome or influence. By contrasting these different potential antonyms, we can gain a better understanding of the nuances of language and the importance of choosing the right words to express our ideas effectively.