köken: From Middle High German blic, from Old High German blik, from Proto-Germanic *blikaz, *blikkaz (“shine, appearance, look; metal”), from Proto-Indo-European *bʰleyǵ- (“to shine”). Cognate with Dutch blik (“look, glance”), Danish blik (“look, glance; tin”), Icelandic blik (“gleam, shine”), Old English blice (“an exposure, manifestation”). More at blick.
aile: Anblick, auf den ersten Blick, auf einen Blick, Augenblick, Ausblick, Blickwinkel, einen Blick werfen, Rundblick, Tunnelblick, Überblick
köken: From Vulgar Latin *oculāta, ultimately from Latin oculus (“eye”). Compare Catalan ullada or Italian occhiata. Or by surface analysis, olho + -ada.