In general usage, yugal means two or a pair; it denotes something that is twin or has two parts. It is a Sanskrit-origin word often used to describe a couple or dual nature.

In Jain literature, there isn’t a distinct technical term called “yugal” with a unique Jain doctrine. It is usually taken in its common sense as “paired” or “twofold” rather than as a specialized Jain concept. If you have a specific verse or context where you saw the word, share it and I can explain it in that particular Jainas-appropriate sense.