The phrase "am marked at" refers to being identified or labeled with a certain characteristic or quality. Some synonyms for this phrase include "am defined by," "am associated with," "am known for," "am distinguished by," and "am recognized as." Each of these phrases indicates that a person, object, or idea is specifically recognized for a certain attribute or trait. It's important to note that while these phrases may be used interchangeably, they may also carry slightly different connotations depending on the context. Regardless of the phrasing, being "marked at" something suggests that it is a defining aspect of the thing being described.