Antonyms for "being endowed with" include "being deprived of", "lacking", and "deficient". These words suggest a lack or absence of natural endowment or gifts that others might possess. They imply a sense of lacking or inferiority, and may be used to describe a person or group who struggles to achieve success or recognition due to limitations in their abilities or resources. In contrast, "being endowed with" suggests a sense of natural advantage or superiority, and may be used to describe a person or group who possesses special gifts or talents that give them an edge in their endeavors.