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NORTH

Old English norð, possibly from PIE 🔍 root ner = left & below​; because

  north is to the left when facing the rising sun* or perhaps because the

sun is at its lowest when in the north.

  (Source of Sanskrit narakah = hell, & Greek neretos = deeper, lower down.) ​

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EAST 🧭  

Proto-Germanic aust = toward the sunrise from PIE root aus = to shine 

(particularly in reference of the dawn)

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🧭 WEST 

Least changed of all directional points; being west in Old English & back to

    Proto-Germanic, from PIE root wes; reduced form of wes-pero = evening, night

  (Also source of Greek hesperos & Latin vesper both = evening, west)​

SOUTH

Old English suþ, Proto-Germanic sunthaz, perhaps literally sun-side from

PIE root sawel = the sun​.

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       * The same idea led to Old Irish tuath = left; northern & Arabic shamal = left hand; north