Encroachment is an act of intrusion, and it can be painful to bear. It's important to articulate this intrusion with precision and tact, and one way to do so is by using synonyms for the word "encroached upon." Some alternative expressions include "trespassed," "invaded," "intruded," "infringed," or "violated." These words are succinct and convey a sense of severity and wrongdoing, providing the necessary gravitas to the situation. Whether it's a physical space, a personal boundary, or a societal norm, the sense of encroachment can be powerful and unsettling. Using synonyms can help express this feeling more clearly and effectively.