The term "ritually unclean" is often used in religious and cultural contexts to refer to something or someone that is impure or untouchable according to specific beliefs or practices. There are various synonyms for this expression, depending on the culture or the context. For instance, in Hinduism, the term "polluted" or "ashuddha" is used to describe something that is impure or unclean. In Judaism, the expression "tamei" refers to a state of impurity that prohibits a person from entering the temple. In Islam, the term "najas" is used to refer to something impure or contaminated. Overall, these terms have similar connotations and are used to describe a variety of impurities or contaminations.