1. to remove the vital force or energy from; to weaken or deprive of vitality
Usage: chiefly British spelling; American English typically uses 'devitalize'; formal or literary
2. to remove the nerve from (a tooth) in dental treatment
Usage: dentistry; technical

Examples

• The long illness devitalised him, leaving him exhausted and weak.
• Constant criticism can devitalise a person's confidence and motivation.
• The dentist decided to devitalise the infected tooth to prevent further damage.
• Economic stagnation devitalised the once-thriving community.
• Repetitive routines devitalised her creative spirit.
• The procedure to devitalise the tooth was completed in one appointment.