1
2
as in harmful
causing or capable of causing harm
one of the ill effects of winter weather is the rapid spread of germs as people spend more time together indoors
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in poorly
temporarily suffering from a disorder of the body
since I'm ill, I guess that I'll just have to miss that dental appointment
Synonyms & Similar Words
Antonyms & Near Antonyms
4
as in poor
falling short of a standard
such ill behavior will not be tolerated
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5
as in ominous
being or showing a sign of evil or calamity to come
the abrupt breakdown of negotiations appears to be an ill omen for this ongoing hostage situation
Synonyms & Similar Words
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1
as in severely
in a manner so as to cause loss or suffering
in those days society treated debtors very ill, even going so far as to put them in prison
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2
as in no
certainly not
you can ill afford to miss another day of work
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1
as in disease
an abnormal state that disrupts a plant's or animal's normal bodily functioning
chicken pox and the other ills that were once a fixture of childhood
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2
as in evil
that which is morally unacceptable
idealistic people who try to cure all of our society's ills
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3
as in misfortune
bad luck or an example of this
the travelers merrily set off on their journey, scarcely imagining the ills that would befall them
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Example Sentences
Examples are automatically compiled from online sources to
show current usage.
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Recent Examples of ill
Mary Walrath-Holdridge, USA Today, 29 May 2026
Voters rejected a state ballot proposal in 1998 to legalize the prescription of lethal medication to help terminally ill, competent, informed adults commit suicide in Michigan, with 71% voting against the initiative.
—CBS News, 28 May 2026
Arkansas Online, 25 May 2026
When one animal falls ill, pathogens can rampage throughout the brood, picking up new mutations along the way.
—Neil Vora, Time, 22 May 2026
ArsTechnica, 7 Apr. 2026
In their absence, the three remaining candidates pounded on a wide array of municipal ills, including broken sidewalks, high rents and sluggish housing production.
—Los Angeles Times, 6 Apr. 2026
See All Example Sentences for ill
Adjective
At least two dozen hikers have fallen ill along the trail near Wrightwood in the San Gabriel Mountains of San Bernardino County over the last two weeks, according to the Victorville Daily Press, part of the USA TODAY Network, resulting in at least one air rescue.
—Mary Walrath-Holdridge, USA Today, 29 May 2026
Voters rejected a state ballot proposal in 1998 to legalize the prescription of lethal medication to help terminally ill, competent, informed adults commit suicide in Michigan, with 71% voting against the initiative.
—CBS News, 28 May 2026
Adverb
Israeli officials are concerned that Hezbollah remains a serious threat to Israel and that Lebanon is ill-equipped to disarm it.
—Arkansas Online, 25 May 2026
When one animal falls ill, pathogens can rampage throughout the brood, picking up new mutations along the way.
—Neil Vora, Time, 22 May 2026
Noun
Even as professional coders are becoming increasingly enthusiastic about the power of AI coding tools, many end users still see them as a boogeyman to instantly blame for any and all observed ills in the tech industry.
—ArsTechnica, 7 Apr. 2026
In their absence, the three remaining candidates pounded on a wide array of municipal ills, including broken sidewalks, high rents and sluggish housing production.
—Los Angeles Times, 6 Apr. 2026
See All Example Sentences for ill
Recent Examples of Synonyms for ill
Adjective
-
One night in April when the boy playing Orlando was home sick and Jamie was waiting for Adele in their private coital chamber, Bromley kept her late to work on the scene where Orlando courts Rosalind playing Ganymede playing Rosalind.—
Jonathan Franzen,
New Yorker,
1 June 2026
-
Recently, she’s begun to feel physically sick due to everything going on in her life and is sharing with us that she’s been struggling with getting up, eating and other simple, everyday things.—
Harriette Cole,
Mercury News,
1 June 2026
Adjective
-
Platforms will be required to introduce safety-by-design features, including protections against manipulative design that encourages compulsive use, and take action against underage accounts and harmful content.—
ABC News,
ABC News,
1 June 2026
-
In addition to being harmful to humans, certain types of mushrooms can be poisonous to pets if consumed.—
Sacbee.com,
Sacbee.com,
1 June 2026
Adjective
-
This fragmented model creates friction and quietly drains profitability through unbilled hours, margin erosion from poorly staffed projects and elevated turnover when top talent hits operational roadblocks.—
DJ Paoni,
Forbes.com,
10 Sep. 2025
-
For however poorly things are going — and the bad tone set by the starters has leaked into some defensive lapses and some pressing at the plate — the Padres got themselves into a really favorable position before this.—
Kevin Acee,
San Diego Union-Tribune,
4 Sep. 2025
Adjective
-
Common travel regrets stem from preventable issues like poor planning, budget problems, and choosing the wrong companions.—
Kathleen Wong,
USA Today,
3 June 2026
-
O’Farrell’s inclination for narratives propelled by brutal coincidence and fatally poor timing tenders a Hardy-esque vision of the world, one that emphasizes the rigid, often cruel limits of an individual’s jurisdiction over the course of their life.—
Rachel Vorona Cote,
Vulture,
2 June 2026
Adjective
-
The exterior further defines the massive, ominous-looking truck.—
James Raia,
Mercury News,
31 May 2026
-
If the sky turns ominous and thunder can be heard, find a secure place for shelter.—
NC Weather Bot,
Charlotte Observer,
30 May 2026
Adverb
-
Finally, if Anthropic is the third to go public, remember the market will be severely depleted of cash.—
Jim Cramer,
CNBC,
31 May 2026
-
The explosion appears to have severely damaged the launch structure, LC36, along with the loss of the rocket.—
Space.com Staff,
Space.com,
30 May 2026
Adverb
-
The leadership of 60 Minutes is no longer recognizable.—
Brian Stelter,
CNN Money,
3 June 2026
-
Fort Moultrie National Monument no longer has information related to rising sea levels that threaten Charleston Harbor.—
Literary Hub,
Literary Hub,
3 June 2026
Noun
-
But some researchers who were involved in the network say the cuts weakened relationships with experts abroad that had been fostered over years, undercutting research collaborations on dangerous diseases like Ebola.—
Theresa Gaffney,
STAT,
3 June 2026
-
The company also flags baseline cardiac disease, abnormal ECG, arrhythmia, prior cervical vagotomy, abnormal cervical anatomy, brain tumor or aneurysm history, head trauma, syncope, seizures and nickel allergy as unevaluated risks.—
Samantha Agate,
Sacbee.com,
3 June 2026
Cite this Entry
“Ill.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ill. Accessed 4 Jun. 2026.
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