late 14c., "ill, invalid, habitually ailing," from sick (adj.) + -ly (1). Meaning "causing sickness" in any sense is from c. 1600. Related: Sickliness.
例文
1. Wallpapers for children too often come only in sickly pastel shade.
子供たち用の壁紙は青白く暗くなることが多い。
2.He was a sickly child.
彼は病気がちな子だ。
3.He had a sickly green pallor.
彼は青白い顔色をして、病容を持っている。
4.It gave off a sickly ,oily smell,as of Chinese ricespirit.
この酒は油の匂いがして、吐き気がして、中国の黄酒のように生きている。
5.He climbed into the conning tower,his eyes haunted and sickly bright.