Origin: Greek suffix -ism
Fundamentalism has 3 different meanings across 1 category:
a form of Protestantism that takes the interpretation of every word in the sacred texts as literal truth
"After reading about fundamentalism, I realized my pastor's group insists on taking every single verse in their Bible as a literal historical account rather than metaphor."
the strict adherence to the basic principles or doctrines of a religion, ideology, etc.
"The group's refusal to adapt their rules for any circumstance showed a rigid form of fundamentalism that alienated many younger members."
The tendency to reduce a religion to its most fundamental tenets, based on strict interpretation of core texts.
"The community's recent split was driven by a shift toward fundamentalism, where they began enforcing a rigid adherence to the literal words of scripture over traditional customs."