triskaidekaphobia
/ˌtrɪsˌkaɪdɛkəˈfoʊbiə/
noun
- An extreme or irrational fear of the number 13.
- Her triskaidekaphobia made her refuse to live on the 13th floor of any building.
- Many hotels skip room number 13 to accommodate guests with triskaidekaphobia.
- Because of his triskaidekaphobia, he would never schedule an important meeting on the 13th of the month.