ipse dixit

[ip-se dik-sit; English ip-see dik-sit] /ˈɪp sɛ ˈdɪk sɪt; English ˈɪp si ˈdɪk sɪt/
Latin.
1.
he himself said it.
2.
an assertion without proof.
British Dictionary definitions for ipse

ipse dixit

/ˈɪpseɪ ˈdɪksɪt/
noun
1.
an arbitrary and unsupported assertion
Word Origin
C16, literally: he himself said it
Word Origin and History for ipse

ipse dixit

Latin, literally "he (the master) said it," translation of Greek autos epha, phrase used by disciples of Pythagoras when quoting their master.

ipse in Technology