Infecundity is the state of being unable to produce offspring or unable to bear fruit. Its antonyms are fertility, fecundity, and fruitfulness. Fertility refers to the ability to produce offspring, while fecundity is the capacity for abundant reproduction. Fruitfulness, on the other hand, pertains to the ability to produce a substantial yield or harvest. Conversely, the antonyms for infecundity are sterility, barrenness, and unproductivity. Sterility refers to the incapacity to produce offspring or seed, while barrenness is the inability to yield crops or bear fruit. Unproductivity is the state of being unproductive or yielding insignificant results.