‘死板’ literally combines ‘dead’ (死) and ‘board/plank’ (板), evoking the image of something as stiff and unyielding as a lifeless wooden board. As an adjective, it describes people, rules, methods, or behavior that lack flexibility, creativity, or adaptability — rigid to the point of being ineffective or socially awkward.

This word carries a mild negative connotation and is commonly used in everyday speech to criticize overly strict routines, unimaginative teaching, bureaucratic procedures, or inflexible personalities. It’s often applied to systems or individuals who follow rules blindly without considering context or human needs. While not harshly insulting, it signals disapproval of unnecessary rigidity — for example, a teacher who refuses to adjust lesson plans even when students clearly struggle would be called 死板.