Undiluted (adjective)

Not having been made weaker or less concentrated by the addition of water or another liquid.

Origin:

From the prefix un- meaning not and the word diluted.

Examples:

1. The undiluted juice was too strong to drink.
2. She drank the undiluted wine and felt the effects immediately.
3. He used undiluted vinegar to clean the kitchen.
4. She only used undiluted shampoo on her hair.
5. The undiluted form of the medicine was prescribed.