"become red; make red," late 14c., from red (adj.1) + -en (1). Old English had readian, reodian "become red." Related: Reddened; reddening.
The setting sun reddened the sky
The sky reddened
red-blooded
redbreast
redcap
redcoat
redd
redden
redder
reddish
rede
redeem
redeemable
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