Translation of two French words

Shadow, if it is the original meaning, uses ombre, a feminine noun.

Reflet is a reflection.

Fade away. I don't know what you mean by fade away. There are many verbs that gradually disappear:

échapper

Dipala? Trey

Sai Wannour

écouler

évanouissem

evaporator

Ale

Senfuer

E. Chapel