Where does “மறைமுகம்” come from?

மறைமுகம் (Tamil) comes from Tamil முகம், from Sanskrit मुख, from Proto-Indo-Iranian múkʰam, from Proto-Indo-Iranian múkHam.

மறைமுகம் (Tamil): indirectness, veiledness, covertness

Definitions

மறைமுகம் traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Tamil	முகம்	face
2	Sanskrit	मुख	mouth; face; visage
3	Proto-Indo-Iranian	múkʰam	—
4	Proto-Indo-Iranian	múkHam	—

Step	Language	Word	Meaning
1	Tamil	மறை	to hide, be hidden
2	Proto-Dravidian	*maṯV-	to forget, being hidden, obscure