fanaticism

This term carries a strong negative connotation, suggesting a loss of rationality or a dangerous level of obsession. It describes a state where devotion transcends passion and becomes a rigid, uncompromising fixation that often excludes opposing viewpoints. As an uncountable noun, it refers to an abstract quality or state of mind. It does not have a plural form and cannot be counted as individual units; instead, it is measured in degrees of intensity or described using partitive constructions like a streak of fanaticism.