A "turnoff" is generally a negative or unpleasant aspect of someone or something that causes a loss of interest or attraction. However, there are various synonyms that can be used to describe such situations. For example, the words "repellent," "off-putting," "disgusting," "repugnant," "unappealing," and "revolting" can all be used to describe something that turns someone away. Other phrases that convey a similar meaning include "deal breaker," "red flag," or "warning sign." Though it is never pleasant to encounter a turnoff, having a good grasp of its synonyms can help to accurately and easily communicate such feelings.