Webster's Revised Unabridged Dictionary · 1913

Sickly

Sickly , adjective

1.
Somewhat sick; disposed to illness; attended with disease; as, a sickly body.
This physic but prolongs thy sickly days. — Shakespeare
2.
Producing, or tending to, disease; as, a sickly autumn; a sickly climate. — Cowper
3.
Appearing as if sick; weak; languid; pale.
The moon grows sickly at the sight of day. — Dryden
Nor torrid summer's sickly smile. — Keble
4.
Tending to produce nausea; sickening; as, a sickly smell; sickly sentimentality.

Sickly , adverb

In a sick manner or condition; ill.
My people sickly [with ill will] beareth our marriage. — Chaucer

Sickly , transitive verb

To make sick or sickly; -- with over, and probably only in the past participle. [Rare]
Sicklied o'er with the pale cast of thought. — Shakespeare
Sentiments sicklied over... with that cloying heaviness into which unvaried sweetness is too apt to subside. — Jeffrey