sunfast

[ suhn-fast, -fahst ]

adjective

1. not subject to fading in sunlight, as a dye, fabric, or garment.

sunfast

/ ˈsʌnˌfɑːst /

adjective

1. not fading in sunlight

Word History and Origins

Origin of sunfast¹

First recorded in 1925–30; sun + fast ¹