Which of the following words means associated or connected?

The word "affiliated" means to be associated or connected with a particular organization, group, or entity. It implies a formal or informal relationship where one party is linked to or integrated with another. This term is often used in contexts such as professional associations, official partnerships, or social groups, emphasizing the connection between the involved parties.

In contrast, "attainment" refers to achieving a goal or reaching a certain level of success, which does not imply any connection or association. "Esteem" relates to regard or respect for someone or something, focusing on admiration rather than connections. "Expunge" means to remove or erase completely, and does not pertain to a sense of connection or association. Hence, "affiliated" is the most appropriate choice for conveying the idea of being connected or associated.