The term 'QUALITY OF BEING STRONG' can be summed up as 'STRENGTH'. STRENGTH is a measure of physical power, the ability to exert force. It is an important attribute for athletes and everyday people alike, as it is necessary for performing many activities. STRENGTH is also a mental quality, as it is required to overcome obstacles and challenges. STRENGTH is often associated with courage and resilience, as it takes STRENGTH to face difficult situations.