Mentally incompetent is a term used to describe a person's inability to think or reason adequately. There are many antonyms for the term 'mentally incompetent,' and these include; wise, intelligent, clever, sagacious, competent, capable, mental alertness, bright, smart, and sharp. Instead of using negative terms to describe individuals who may be struggling with mental illness or cognitive difficulties, we can focus on their strengths and qualities. By using antonyms such as these, we can shift our language towards a more positive and respectful framework. This can help promote understanding, compassion, and support for those who may need it the most.