The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Avatarika

Avatarika

वदुपकरोति- इति तदुभयं प्रपञ्चयति-

In plain words

Explaining how one assists another, he elaborates upon both aspects.

Close to the Sanskrit

Thus he helps—he elaborates both of that.