devitalising

verb
  1. present participle of devitalise; to remove vitality, energy, or life force from something or someone
  2. Usage: British spelling; American equivalent is 'devitalizing'; often used in medical, dental, or figurative contexts
adjective
  1. tending to reduce or remove vitality, strength, or vigor
  2. Usage: used attributively to describe something that causes loss of energy or life

Examples