The antonyms for the word "is source strength" are weakness, inadequacy, frailty, feebleness, incompetence, impotency, and vulnerability. These words represent the opposite of strength and suggest a lack of power or ability. While being a source of strength is desirable, it is important to recognize that weakness can be just as valuable. Weakness can inspire empathy, create opportunities for growth and learning, and foster interdependence among individuals. Therefore, it is essential to acknowledge that not everything is a source of strength and honor the different facets of our experiences that make us who we are.