theism
n. US //ˈθiɪzəm// UK //θˈiːɪzəm// the·ism
Coined, theo- + -ism. ultimately from Ancient Greek θεός (theós, “god”). Attested in English from 1678, theist being attested 16 years earlier in 1662. Cognate French théisme, as in Diderot Principes de la philosophie morale (1745), which was probably borrowed from English.
Borrowing from New Latin thea (“tea”, noun) + English -ism.