undiluted solution; stock solution; concentrate
Refers to a liquid before dilution, often in industrial, laboratory, or household contexts (e.g., cleaning agents, chemicals).
Do not use this detergent undiluted; always dilute it with water.
In the experiment, the stock solution was diluted tenfold before use.
Compound of 原 (げん, 'original') and 液 (えき, 'liquid').