The antonyms for the term "more toxiferous" are words that describe the absence of toxicity or poisons. Some possible antonyms for "more toxiferous" include non-toxic, non-poisonous, innocuous, harmless, safe, and benign. These words describe substances that do not pose any danger or harm to living organisms. For example, organic fruits and vegetables are often touted as non-toxic alternatives to conventionally grown produce that may contain pesticides and other harmful chemicals. Similarly, many cleaning products, such as vinegar and baking soda, are considered safer and more benign than chemical cleaners. Ultimately, using non-toxic and safe alternatives can help to reduce exposure to harmful substances and promote better health and well-being.