sickly (sicklier comparative) (sickliest superlative )
1 adj A sickly person or animal is weak, unhealthy, and often ill.
He had been a sickly child.
2 adj A sickly smell or taste is unpleasant and makes you feel slightly sick, often because it is extremely sweet.
...the sickly smell of rum.
3 adj A sickly colour or light is unpleasantly pale or weak.
usu ADJ n
Wallpapers for children too often come only in sickly pastel shades.