As adjectives the difference between yellowed and unyellowed
is that yellowed is having a yellow color (or discoloration), especially when due to age while unyellowed is not yellowed.
As a verb yellowed
is (yellow).
yellowed
English
Adjective
(
en adjective)
Having a yellow color (or discoloration), especially when due to age.
Verb
(head)
(yellow)