"Prefixal" refers to anything that is related to prefixes, which are a group of letters added to the beginning of a word to change its meaning or create a new word. Some synonyms for "prefixal" include "prefixed," "prefixical," "prefixoid," and "prefixive." These words all describe the same concept of adding a prefix to a word. However, some of these words may not be commonly used or recognized by everyone. Regardless of the specific word used, the goal is to accurately convey the concept of modifying words through prefixes. Understanding common prefixes and their meanings can greatly improve one's vocabulary and comprehension of language.