Triskaidekaphobia
![Stall numbers at Santa Anita Park progress from 12 to 12A to 14.](/Images/godic/202502/17/P2110024NoThirteenStaAnita_wb5955.jpg")
![The exposed lift shaft of an apartment block under construction. The lift shaft has numbers marking the levels, but the 13th level is instead marked with a heart](/Images/godic/202502/17/Lane_Cove_West_apartments_lift_shaft5955.JPG")
![An elevator in a residential apartment building in Shanghai. Floor numbers 4, 13 and 14 are missing, and there is a button for the](/Images/godic/202502/17/ShanghaiMissingFloors5955.jpg")
Triskaidekaphobia (pronunciation: /ˌtrɪskaɪˌdɛkəˈfoʊbiə, ˌtrɪskə-/, TRIS-kye-DEK-ə-FOH-bee-ə or TRIS-kə-DEK-ə-FOH-bee-ə; from Greek tris meaning "three", kai meaning "and", deka meaning "10" and phobos meaning "fear" or "morbid fear") is fear of the number 13 and avoidance to use it. It is also a reason for the fear of Friday the 13th, called paraskevidekatriaphobia (from Παρασκευή Paraskevi, Greek for Friday) or friggatriskaidekaphobia (after Frigg, the Norse goddess after whom Friday is named in English).