1. to remove the vital force, energy, or liveliness from something; to weaken or deprive of vigor
Usage: British spelling (American: devitalizes); third person singular present tense
2. in dentistry, to remove the vital tissue (pulp) from a tooth
Usage: technical/medical; British spelling (American: devitalizes)

Examples

• The constant criticism devitalises the team's morale and confidence.
• A sedentary lifestyle devitalises the body and mind.
• The dentist devitalises the infected tooth before filling it.
• Repetitive routines can devitalise creative thinking.
• Economic hardship devitalises communities and reduces opportunity.
• The procedure devitalises the pulp chamber to prevent further decay.