Douglas Harper's Etymology Dictionary
Wiktionary
a. Not '''forgotten'''.
Wikipedia
Unforgotten is a British television crime drama broadcast on ITV that first premiered 8 October 2015. It was created and written by Chris Lang. Series 1 focuses on four people whose lives are rocked when the bones belonging to a young man who died 39 years ago are discovered below a demolished house. After the success of the first series, ITV commissioned a second series of the drama set to air in late 2016 with Chris Lang returning as writer.
Usage examples of "unforgotten".
Then I began to play the piano and she sang again, and the kiss and that wonderful hour remained unmentioned, though unforgotten, as our final secret.
The unforgotten dearest dead may be Watching us, with unslumbering eyes and heart, Brimful of words which cannot yet be said, Brimful of knowledge they may not impart, Brimful of love for you and love for me.
Very fierce are the Dacotahs, Often is there war between us, There are feuds yet unforgotten, Wounds that ache and still may open!
And in your eye floateth there not a cloudlet of unforgotten earthly bliss?
But Ged went on, falcon-winged, falcon-mad, like an unfalling arrow, like an unforgotten thought, over the Osskil Sea and eastward into the wind of winter and the night.