ill

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ill¹

  • /ɪl/

Rhymes with -ɪl

Where it comes from

From Middle English ille (“evil; wicked”), from Old Norse íllr (adjective), ílla (adverb), ílt (noun), from Proto-Germanic *ilhilaz, from Proto-Indo-European *h₁elḱ- (whence Latin ulcus (“sore”), Ancient Greek ἕλκος (hélkos, “wound, ulcer”), Sanskrit अर्शस् (árśas, “hemorrhoids”)).

Cognates

Cognate with Scots and Yola ill, Danish ilde (“bad”), Faroese, Icelandic illur (“bad, ill, wicked”), Norwegian Bokmål, Norwegian Nynorsk ille (“bad”), Swedish illa (“badly; poorly”).

adjective iller · more ill · illest · most ill

  1. obsolete Evil; wicked (of people). St. Paul chose to magnify his office when ill men conspired to lessen it.
  2. archaic Morally reprehensible (of behaviour etc.); blameworthy. ‘Go bring her. It is ill to keep a lady waiting.’
  3. Indicative of unkind or malevolent intentions; harsh, cruel. He suffered from ill treatment.
  4. Unpropitious, unkind, faulty, not up to reasonable standard. ill manners; ill will
  5. Unwell in terms of health or physical condition; sick. mentally ill people
  6. Nauseated; having an urge to vomit. Seeing those pictures made me ill.

    Similar: disgusted, nauseated, nauseous, sick, sicken

  7. slang Sublime, with the connotation of being so in a singularly creative way. This is the illest beat I've ever heard.

    Similar: dope

  8. slang Extremely bad (bad enough to make one ill). Generally used indirectly with to be. That band was ill.
  9. dated Unwise; not a good idea. Oh that when the devil and flesh entice the sinner to sport with and make a mock of sin, Prov. x. 23, he would but consider, it is ill jesting with edged tools, it is ill jesting with unquenchable burnings; […]
  10. Appalachia Bad-tempered.

    Similar: diseased, poorly, sick, under the weather, unwell, ailing

Similar: bad, mal-, crank, crook, green about the gills, icky, ill, indisposed, infirm, like death warmed over, lousy, maladive, mawkish, off one's feed, on the Pat and Mick, out of sorts, Pat and Mick, punk, puny, queer, ropy, rough, sickish, sickly, sick as a dog, sick as a parrot, tumid, unhealthy, valetudinarian, valetudinary · Opposite: fine, hale, healthy, in good health, well, good, wack

adverb worse · more ill · worst · most ill

  1. Not well; imperfectly, badly Such jealousy ill becomes her; she can ill afford another gaffe like that.

    Similar: illy

Opposite: well

noun ills

  1. countable, uncountable Trouble; distress; misfortune; adversity. Music won't solve all the world's ills, but it can make them easier to bear.
  2. countable, uncountable Harm or injury. I wouldn't want you to do me ill.
  3. countable, uncountable Evil; moral wrongfulness. Strong virtue, like strong nature, struggles still, / Exerts itself, and then throws off the ill.
  4. countable, uncountable A physical ailment; an illness. I am incapacitated by rheumatism and other ills.
  5. US, slang, uncountable PCP, phencyclidine.

verb ills · illing · illed

  1. dated, intransitive, slang To behave aggressively. D.M.C.: You been illin' lately. Run: So, I'm illin'. Am I illin'? Chillin'! You know what I'm sayin'? Chillin'.

ILL²

noun ILLs

  1. abbreviation, initialism Initialism of interlibrary loan

Ill³

Where it comes from

From French Ill.

proper noun the Ill

  1. A river in France, tributary to the Rhine.

Thesaurus

Closest in meaning: badly, inauspicious, bad, unpropitious, harmful, hostile, poorly, trouble, faint, afflicted, stricken, distress, infirm, ailing, indisposed, upset

adverb

Opposite: well

Translations

Every language

adj in poor health, suffering from a disease

Españolenfermo, mareado
한국어병들다 byeongdeulda, 앓다 alta
日本語病気 byōki
中文病 bìng
हिन्दीअस्वस्थ asvasth, बीमार bīmār, रोगी rogī
Kiswahili-gonjwa
Portuguêsdoente
Françaismalade
Deutschkrank, siech
Italianomalato
Ελληνικάάρρωστος árrostos
Românăbolnav, abătut
Русскийбольно́й bolʹnój, хво́рый xvóryj
Tiếng Việtbệnh, ốm
العربيةمَرِيض marīḍ
עבריתחוֹלֶה kholé

adj having an urge to vomit

Españolmal, mareado
Françaisécœuré, écœurée
Deutschübel, schlecht

adj in hip-hop slang: sublime

Françaiss

adv not well

Españolmal
Françaismal

noun a problem

DeutschÜbel

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Cite this
MLA

"ill." Wiktionary, via Micwyn, micwyn.com/word/ill. Accessed 6 Nov. 2026.

APA

ill. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/ill

Chicago

"ill." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/ill.

BibTeX
@misc{ill_2026,
  title = {ill},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/ill},
  urldate = {2026-11-06}
}