The term "become contaminated" depicts the process of becoming impure or contaminated with harmful substances or pathogens. There are various synonyms for this phrase, such as "polluted," which indicates the presence of pollutants or impurities in a given substance or environment. Another synonym is "tainted," which denotes that something has been spoiled or stained as a result of contamination. Furthermore, the term "infected" suggests that pathogens or harmful microorganisms have contaminated a person, animal, or the environment. Additionally, "spoiled" or "adulterated" are synonyms for the phrase "become contaminated" which imply that something has been altered or tampered with in a harmful way.