untreated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Left untreated, the infestation can be deadly, and the parasites can quickly spread.

From Barron's • Jun. 4, 2026

At the same time, dissolved salts and minerals are guided away from the active area and deposited onto untreated sections of the panel called passive regions.

From Science Daily • May 31, 2026

Melanoma is the most serious form of skin cancer and, untreated, can be deadly.

From BBC • May 21, 2026

All of those properties stand close to Coronado’s wide, sandy beaches — which means they all face challenges as waters are often fouled by the northward flow of untreated sewage from greater Tijuana.

From Los Angeles Times • May 13, 2026

This did not happen on nearby untreated areas.

From "Silent Spring" by Rachel Carson