Sporogenous, which means producing spores, has several antonyms, including "sterile," "infertile," "barren," and "aseptic." Sterile refers to something that is devoid of life or ability to reproduce, such as a sterile environment or a sterile instrument. Infertile refers to something that cannot produce offspring or fruit, such as infertile soil or an infertile animal. Barren refers to something that is incapable of producing vegetation or crops, such as a barren desert or a barren land. Aseptic refers to something that is free of contamination, such as an aseptic environment or an aseptic technique used in medical procedures.