lightfast
adjective
light·fast ˈlīt-ˌfast 
: resistant to light and especially to sunlight
especially : colorfast to light
lightfastness
ˈlīt-ˌfas(t)-nəs
noun 
Word History
First Known Use
1904, in the meaning defined above
- full well
- full whack
- full word
- full-blood
- full-blooded
- full-bloodedness
- full-bloods
- full-blown
- full-bodied
- full-bodied money
- full-boled
- full-bore
- full-bosomed
- full-bottomed
- full-bound
- full-cell process
- full-cell treatment
- full-court press
- full-cream
- full-crew law
- full-crown fender
- full-dress
- full-dress uniform
- full-dressed
- full-fashioned