इति अपराजितः ।सर्वकर्मसु समर्थ इति, सर्वान् शत्रून् सहत इति वा सर्वसहः ।सर्वान् स्वेषु स्वेषु कृत्येषु व्यवस्थापयतीति नियन्ता ।न नियमो नियतिस्तस्य विद्यत इति अनियमः, सर्वनियन्तुः नियन्त्रन्तराभावान् ।नास्य विद्यते यमो मृत्युरिति अयमः ।अथवा. यमनियमौ योगाङ्गे ; तगम्यत्वात्स एव नियमः यमः ॥
In plain words
Because He is never conquered by adversaries, He is Aparajita. Because He is competent in all undertakings or withstands all foes, He is Sarvasaha. Because He establishes every creature in its respective function, He is Niyanta. Because He is the supreme controller of all and has no other ruler above Him, He has no binding destiny over Him, hence Aniyama. Because death has no jurisdiction over Him, He is Ayama. Alternatively, since yama and niyama are the disciplines of yoga and He is attained through them, He Himself embodies Yama.
Close to the Sanskrit
Thus Aparajita because He cannot be defeated by enemies. Sarvasaha because He is capable in all actions or because He endures all enemies. Niyanta because He appoints all beings in their respective duties. Aniyama because no rule or destiny exists for Him, owing to the absence of any other controller above the supreme controller of all. Ayama because death or controller Yama does not exist for Him. Or, since yama and niyama are yoga limbs, because He is attained through them, He Himself is Niyama and Yama.