In Jainism, "Niyanu" (sometimes spelled as "Niyanu," "Niyanuṁ," or "Niyanuṁ karvuṁ" in Gujarati) refers to making a specific religious vow or resolution, often before performing a spiritual activity or religious observance. In English, "Niyanu" can be translated as "taking a vow," "making a religious resolution," or "pledging an intention."

For example, Jains might do "Niyanu" before starting a fast (upvas), reading scriptures, or engaging in meditation, to set their intention and focus for the religious act.