sun·burn 
/ˈsʌnˌbɚn/ noun
plural sun·burns /ˈsʌnˌbɚn/ noun : a condition in which your skin becomes sore and red from too much sunlight [count] ▪ He has a bad sunburn. [noncount] ▪ Use sunscreen to prevent sunburn.
— sunburn verb, sunburns; sunburned /-ˌbɚnd/ or sunburnt /-ˌbɚnt/ sunburn·ing [no obj] chiefly US
▪ Her skin sunburns [=burns] easily. = She sunburns easily.
▪ Her skin sunburns [=burns] easily. = She sunburns easily.
