Did you Know?
Triskaidekaphobia (/ˌtrɪskaɪˌdɛkəˈfoʊbiə/ TRIS-kye-DEK-ə-FOH-bee-ə, /ˌtrɪskə-/ TRIS-kə-; from Ancient Greek τρεισκαίδεκα (treiskaídeka) 'thirteen', and Ancient Greek φόβος (phóbos) 'fear'😉[1] is fear or avoidance of the number 13. It is also a reason for the fear of Friday the 13th, called paraskevidekatriaphobia (from Greek Παρασκευή (Paraskevi) 'Friday', Greek δεκατρείς (dekatreís) 'thirteen', and Ancient Greek φόβος (phóbos) 'fear'😉 or friggatriskaidekaphobia (from Old Norse Frigg 'Frigg', Ancient Greek τρεισκαίδεκα (treiskaídeka) 'thirteen', and Ancient Greek φόβος (phóbos) 'fear'😉.
The term was used as early as in 1910 by Isador Coriat in Abnormal Psychology.[2]