Select the INCORRECTLY spelt word.

Maintanence 

The incorrectly spelled word is Maintanence. The correct spelling is Maintenance.

• Equanimity means a state of calmness or composure, especially in difficult circumstances.
• Maintenance means the process of keeping something in good condition or repair.
• Cognizant means aware of or understanding something.
• Callous means unfeeling or insensitive.