proof against the sun, unable to be harmed by the sun, through which sun cannot penetrate
sunproof in American English
(ˈsʌnˌpruf)
adjective
impervious to or unaffected by sunlight
sunproof in American English
(ˈsʌnˌpruːf)
adjective
impervious to sunlight or damage by the rays of the sun
Word origin
[1600–10; sun + -proof]This word is first recorded in the period 1600–10. Other words that entered Englishat around the same time include: alpine, operate, progressive, skid, umbrella-proof is a combining form meaning “resistant, impervious to” that specified by the initialelement. Other words that use the affix -proof include: burglarproof, childproof, waterproof