friggatriskaidekaphobia

From Frigga (an English variant of Old Norse Frigg, the Norse goddess for whom Friday was named) + Ancient Greek τρεῖς (treîs, “three”) + Ancient Greek καί (kaí, “and”) + Ancient Greek δέκα (déka, “ten”) + -phobia.

friggatriskaidekaphobia (uncountable)

1. The fear of Friday the thirteenth.
   • 2012, R. W. A. Mitchell, Ask a Little-Learn a Lot: How Questions Change Everything, iUniverse (2012), →ISBN, page 90:

     The fear of Friday the thirteenth, or friggatriskaidekaphobia, takes the thirteen superstition to a whole new level.

   • 2013, Sara Latta, Scared Stiff: Everything You Need to Know About 50 Famous Phobias, Zest Books (2013), →ISBN, page 186:

     Friggatriskaidekaphobia is probably the most common superstition in the United States; according to researchers, it affects 17 to 21 million people.

   • 2013, Rachel Wise, Breaking News, Simon Spotlight (2013), →ISBN, page 2:

     So I started Googling, and I found some interesting information about “friggatriskaidekaphobia.” (That's the actual term for the condition of the fear of Friday the thirteenth. […]

• triskaidekaphobia