χαλεπός describes what is hard to deal with—whether difficult circumstances, dangerous situations, or fierce behavior. In Matthew 8:28, it characterizes the two demon-possessed men Jesus encountered in the country of the Gadarenes: they were 'so fierce (χαλεποὶ) that no one could pass that way'—violent, dangerous, impossible to control. In 2 Timothy 3:1, Paul warns that 'in the last days difficult times (καιροὶ χαλεποί) will come'—seasons characterized by hardship, moral decay, and spiritual danger. The word suggests not mere difficulty but genuine peril.