Sāmaveda 1:6 Translation

त्वं नो अग्ने महोभिः पाहि विश्वस्या अरातेः उत द्विषो मर्त्यस्य (Sāmaveda 1:6)

Vigraha & Anvaya

त्वम् नः महोभिः पाहि अग्ने विश्वस्या अरातेः उत मर्त्यस्य द्विषः 

Agni, protect us with [through] your might, from all adversity/malignity [and] from the enmity/hatred of mortals.

अग्ने - vocative - addressing Agni

त्वम्  - you

नः - us (this is a short form for अस्मान् =हम को) 

महोभिः - ablative plural पञ्चमी विभक्ति बहुवचन of Might (महन् neuter noun)  = might or great deeds से*. The ablative has a sense of source =from, as a result of 

पाहि - protect (Imperative - You protect [us])

विश्वस्या - of the world/universe=all (feminine genitive singular adjective agreeing with अरातेः

अरातेः - from adversity/malignity (ablative singular of feminine noun अराति = adversity, malignity. Declines like शक्ति)

उत - and, even

मर्त्यस्य - of mortals (masculine, genitive, singular)

द्विषः - Enemies, hatred (nominative, plural of द्विष् m/n) 

* could also be ablative plural of मह (neuter noun meaning great deeds)