1The patient's wound was left untreated for several days, leading to a serious infection.
2Is the water from the well untreated, or has it been filtered and purified?
3The doctor warned that if the disease was left untreated, it could lead to severe complications.
4Untreated mental health issues can have a significant impact on a person's overall well-being.
5The researchers studied the effects of untreated diabetes on the cardiovascular system.