What is another word for third rail?
Pronunciation: [θˈɜːd ɹˈe͡ɪl] (IPA) 
The term "third rail" technically refers to an electrified rail that supplies power to a train's electric motor. However, the phrase has been appropriated in popular culture to refer to a controversial or volatile topic, one that is best left untouched for fear of negative consequences. Some synonyms for "third rail" in this sense might include "hot button issue," "sensitive subject," "taboo topic," or "landmine." These terms all suggest that discussing certain topics could ignite strong emotions or reactions, making them difficult or potentially dangerous to address head-on. Knowing how to navigate these third rail topics with sensitivity and tact can be an important skill in many areas of life.
