Impairment: Impairment refers to any diminished or weakened function or ability. It suggests that there is a notable hindrance or limitation in performing certain tasks.
Deficiency: Deficiency implies a lack of something necessary or required. In this context, it suggests that there is an absence of essential skills or abilities needed for optimal performance.
Shortcomings: Shortcomings refer to faults, inadequacies, or deficiencies. They highlight areas where someone falls short compared to what is expected or desired.