Saṃvara is stoppage of karma. The first step to emancipation or the realization of the self is to see that all channels through which karma has been flowing into the soul have been stopped, so that no additional karma can accumulate. This is referred to as the stoppage of the inflow of karma (saṃvara). There are two kinds of saṃvara: that which is concerned with mental life (bhava-saṃvara), and that which refers to the removal of karmic particles (dravya- saṃvara). This stoppage is possible by self-control and freedom from attachment. The practice of vows, carefulness, self-control, observance of ten kinds of dharma, meditation, and the removal of the various obstacles, such as hunger, thirst, and passion stops the inflow of karma and protect the soul from the impurities of fresh karma.
Read more about this topic: Tattva (Jainism)