From Old English 'sceadu' (shade, shadow), from PIE *skot- (darkness) — 'shade' and 'shadow' split from the same word.
Comparative darkness caused by shelter from direct light.
From Old English 'sceadu' meaning 'shade, shadow, darkness,' from Proto-Germanic *skadwaz, from PIE *skot- (darkness, shadow). 'Shade' and 'shadow' are the same word — shade is the nominative, shadow the oblique case form. Key roots: *skot- (PIE: "darkness, shadow