SICKLIEST

Frequently ill or in poor health.

Example: "A sickly child"

Not in good health; (somewhat) sick.

(of a plant) characterized by poor or unhealthy growth.

Appearing ill, infirm or unhealthy; giving the appearance of illness.

Example: "A sickly pallor"

Shedding a relatively small amount of light; (of light) not very bright.

Lacking intensity or vigour.

Example: "A sickly smile"

Associated with poor moral or mental well-being.

Tending to produce nausea.

Example: "A sickly smell; sickly sentimentality"

Overly sweet.

Marked by the occurrence of illness or disease (of a period of time).

Tending to produce disease or poor health.

Example: "A sickly autumn; a sickly climate"