Comparative form of cranky; more irritable or bad-tempered than someone or something else.
From cranky + -ier (comparative suffix). Like crankest, based on cranky, an adjective of uncertain origin possibly related to mechanical jerkiness or Dutch/German words.
Studies show you actually become measurably crankier as the day goes on due to decision fatigue—your brain literally runs out of willpower juice by evening, making small annoyances feel huge.
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