It is hard to tell if this is a prompt for a personal essay or if you are looking for several different answers to possibly include in your essay. If you are effected by hippopotomonstrosesquipedaliophobia, you should write about your own experience. I encourage you to think of two to three specific incidences you could focus on in your body paragraphs to illustrate your feelings with actual examples.
If you are not personally affected by hippopotomonstrosesquipedaliophobia, you have two options. You could do some basic research and write about others' experiences, or you could write from the perspective of why this is not something that affects you. Again, whichever route you choose to approach this essay, I want to reiterate that specific examples in the form of personal stories are going to be the best support/elaboration for this prompt. Avoid writing your essay from the hypothetical standpoint. Suggestions and possibilities are typically considered weak as evidence.
The term hippopotomonstrosesquipedaliophobia is used to refer to the fear of long words.
Those affected by hippopotomonstrosesquipedaliophobia claim that it causes panic attacks and keeps them away from friends, colleagues and family members. It also leads to rapid breathing, sweating, an overall feeling of dread, shortness of breath, irregular heartbeat and nausea, whenever long words are heard.
In a good way it may let you live your life with just the use of words that have two or less syllables. (Sorry, I couldn't find a shorter word for syllables)