Definition

Not having undergone any treatment or process to change its condition or state.

Example

The untreated water from the river is not safe to drink.

Conversation

I just found out that my allergies are due to some untreated mold in my apartment.

Oh no, that sounds serious!

Yeah, I didn't realize how much it could affect me until now.

You should definitely get it checked out. Living with untreated mold isn't safe.

Synonyms & Antonyms

Root Explanation

Untreated → It is formed from the prefix "un-" (meaning not) and the root "treat" (from Old French *traiter*, meaning to handle or deal with). The word "untreated" means not handled or dealt with in a particular way.

Memory Tip

Think of 'not' ('un-') handling or dealing with something ('treat') — that's why untreated means something that hasn't been managed or processed.

Visually Confused Words