sick·ly 
/ˈsɪkli/ adjective
sick·li·er; sick·li·est /ˈsɪkli/ adjective [also more sickly; most sickly] 1 a : often affected by a disease or illness : not healthy and strong
▪ a sickly child ▪ a sickly plant
b : caused by or relating to sickness
▪ a sickly complexion/appetite 2 a : causing a person to feel sick
▪ A sickly [=nauseating] odor filled the room.
b : causing feelings of dislike or disgust
▪ The walls were painted a sickly yellow. 3 : weak and pale
▪ The lamp gave off a sickly glow.
▪ a sickly child ▪ a sickly plant
b : caused by or relating to sickness
▪ a sickly complexion/appetite
▪ A sickly [=nauseating] odor filled the room.
b : causing feelings of dislike or disgust
▪ The walls were painted a sickly yellow.
▪ The lamp gave off a sickly glow.
— sickly adverb
▪ The dessert has a sickly sweet taste.
▪ The dessert has a sickly sweet taste.
