French flou

← English lew (link)

← Middle French flou (mention)

← Old French flou (mention)

← Old French flo (mention)

← Proto-Germanic *hlēwaz (mention)

← Proto-Indo-European *ḱlēw- (mention)

← Latin flāvus (mention)

→ Luxembourgish flou (borrowed)

→ Dutch flou (borrowed)

→ Turkish flu (borrowed)