The fact of lacking strength.
Lack of strength or vigor. Weakness is the state or quality of being without strength, firmness, or power.
The term “weakness” is employed to characterize a diminished level of energy or strength. This symptom is frequently encountered in various medical conditions, including anemia, emotional issues, as well as disorders that impact the heart, nervous system, bones, joints, and muscles. In cases linked to emotional disorders, weakness might indicate a lack of motivation or ambition rather than a decline in physical muscle strength.
To be more precise, this term refers to the decline in strength in specific muscle groups, often accompanied by muscle atrophy and a decrease in sensation.