Webster's Revised Unabridged Dictionary · 1913

Redden

Redden (r?d"d'n) , transitive verb

[From Red, a.]

To make red or somewhat red; to give a red color to.

Redden , intransitive verb

To grow or become red; to blush.
Appius reddens at each word you speak. — Pope
He no sooner saw that her eye glistened and her cheek reddened than his obstinacy was at once subbued. — Sir W. SCott