Ill, unwell, sick
The word 'poorly' is correct and usable in written English. It can be used as an adverb to mean "in a manner that is bad or unsatisfactory" or as an adjective to mean "not having or showing good health, confidence, or ability". Example sentence: The student performed poorly on the test.
I'd read the lyrics of songs I liked, lots of Led Zeppelin and AC/DC, and got my friends to correct me when I spoke poorly.
The death of Gurley, whom Bratton called "a total innocent" at the time, helped seal the indictment of the city's practice of allowing poorly trained officers to police impact zones.
Despite delivering well-aimed punches on Darling's lack of detail about future tax powers and Scotland's viability outside the UK, the first minister flailed on his "plan B" proposals for a currency now that the UK parties had vetoed a deal on the pound, relying on poorly judged quips about no campaigners worrying about aliens invading Scotland.
However, their leader, Gerry Adams, has thus far performed poorly on television and radio, showing an inability to answer detailed questions about the republic's economy.
The idea that Muslims as a group are poorly integrated is not borne out by the facts.
"He was really poorly in the four days we had him: he had seven transfusions, he had bleeding on the brain, his potassium levels were through the roof.
For all that his summer ended with a World Cup medal round his neck and a large tattoo of the trophy on his left shoulder (no matter that he saw not a single minute of Brazil-based action), it started pretty poorly for Kevin Grosskreutz.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK