The antonyms for the word "became versed" would include "uninformed," "ignorant," "unschooled," and "inexperienced." These words represent a lack of knowledge or expertise, and suggest a person has yet to learn about a particular subject or area. Someone who is uninformed may have a general lack of information, while someone who is unschooled may not have had the opportunity to learn. Ignorant suggests a willful disregard for information, while inexperienced simply implies a lack of practical experience. When we contrast these words with "became versed," it becomes clear that this phrase implies an active effort to learn and become knowledgeable.