A matter or action that must be strictly avoided due to potential negative consequences or societal norms, often indicating a strong disapproval or caution regarding its acceptance or practice.

An item or behavior considered undesirable or unfavorable, which may invoke feelings of dislike or aversion in certain contexts, emphasizing the importance of avoiding it.

A subject or practice that is deemed inappropriate or unacceptable, suggesting that engaging with it could lead to harm or undesirable outcomes, thus highlighting the need for restraint.