adj · adv · verb · 16 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
/ˈsɪkli/
Southern-England:Recorded audio is listed in the source snapshot.
rhymes with -ɪkli
CMU ARPABET:S IH1 K L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Frequently ill or in poor health; weakly.
Definition source: English Wiktionary via Wiktextract
Examples
a sickly child
1759, Tobias Smollett, letter dated 16 March, 1759, in James Boswell, The Life of Samuel Johnson, London: Charles Dilly, 1791, Volume 1, p. 190, ... the boy is a sickly lad, of a delicate frame, and particularly subject to a malady in his throat, which renders him very unfit for his Majesty’s service.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adj
Meaning 2
Not in good health; (somewhat) sick.
Definition source: English Wiktionary via Wiktextract
Examples
1782, Samuel Johnson, letter dated 20 March, 1782, in James Boswell, The Life of Samuel Johnson, London: Charles Dilly, 1791, Volume 2, p. 419, The season was dreary, I was sickly, and found the friends sickly whom I went to see.
1850, Charlotte Brontë, letter dated 29 April, 1850, in Elizabeth Gaskell, The Life of Charlotte Brontë, London: Smith, Elder, 1857, Chapter 6, p. 157, Papa continues far from well; he is often very sickly in the morning,
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adj
Meaning 3
Characterized by poor or unhealthy growth. (of a plant)
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
adj
Meaning 4
Appearing ill, infirm or unhealthy; giving the appearance of illness.
Definition source: English Wiktionary via Wiktextract
Examples
a sickly pallor
1782, Frances Burney, Cecilia, London: T. Payne and Son, and T. Cadell, Volume 1, Book 1, Chapter 9, p. 121, ... she exhibited a countenance so wretched, and a complection so sickly, that Cecilia was impressed with horror at the sight.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
adj
Meaning 5
Shedding a relatively small amount of light; (of light) not very bright.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: faint, pale, wan
Antonyms: none provided
6
adj
Meaning 6
Lacking intensity or vigour.
Definition source: English Wiktionary via Wiktextract
Examples
a sickly smile
a sickly winter sun
Meaning relationships
Synonyms: faint, feeble, insipid, weak
Antonyms: none provided
7
adj
Meaning 7
Associated with poor moral or mental well-being.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: unhealthy
Antonyms: none provided
8
adj
Meaning 8
Tending to produce nausea.
Definition source: English Wiktionary via Wiktextract
Examples
a sickly smell; sickly sentimentality
Meaning relationships
Synonyms: nauseating, sickening
Antonyms: none provided
9
adj
Meaning 9
Overly sweet.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: cloying, saccharine
Antonyms: none provided
10
adj
Meaning 10
Marked by the occurrence of illness or disease (of a period of time).
Definition source: English Wiktionary via Wiktextract
Usage: obsolete
Examples
a. 1768, Laurence Sterne, undated letter in Original Letters, London: Logographic Press, 1788, pp. 110-111, ... if I thought the sentiments of your last letter were not the sentiments of a sickly moment—if I could be made to believe, for an instant, that they proceeded from you, in a sober, reflecting condition of your mind—I should give you over as incurable,
Meaning relationships
Synonyms: none provided
Antonyms: none provided
11
adj
Meaning 11
Tending to produce disease or poor health.
Definition source: English Wiktionary via Wiktextract
Usage: obsolete
Examples
a sickly autumn; a sickly climate
Meaning relationships
Synonyms: insalubrious, unhealthy, unwholesome
Antonyms: none provided
12
adv
Meaning 12
In a sick manner; in a way that reflects or causes sickness.
Definition source: English Wiktionary via Wiktextract
Examples
sickly pale; to cough sickly
Meaning relationships
Synonyms: none provided
Antonyms: none provided
13
verb
Meaning 13
To make (something) sickly.
Definition source: English Wiktionary via Wiktextract
Usage: archaic, literary, transitive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
14
verb
Meaning 14
To become sickly.
Definition source: English Wiktionary via Wiktextract
Usage: intransitive, rare
Examples
1889, Samuel Cox, An Expositor’s Notebook, London: Richard D. Dickinson, 7th edition, Chapter 26, p. 364, But the seven most prominent Apostles [...] still hang together, their hearts tormented with eager yet sad questionings, their hopes fast sicklying over with the pale hues of doubt.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
15
adjective satellite
Meaning 15
unhealthy looking
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: sallow
Antonyms: none provided
16
adjective satellite
Meaning 16
somewhat ill or prone to illness
Definition source: Princeton WordNet 3.0
Examples
my poor ailing grandmother
feeling a bit indisposed today
you look a little peaked
feeling poorly
a sickly child
is unwell and can't come to work
Meaning relationships
Synonyms: ailing, indisposed, peaked(p), poorly(p), unwell, under the weather, seedy
Antonyms: none provided
History
Etymology
From Middle English seekly, sekely, siklich, sekeliche, equivalent to sick + -ly. Possibly a modification of Old English sīcle (“sickly”) and/or derived from Old Norse sjúkligr (“sickly”). Cognate with Dutch ziekelijk, Middle High German siechlich, Danish sygelig, Swedish sjuklig, Icelandic sjúklegur. The verb is from the adjective.
From sick + -ly.
Across languages
Translations
105 source translations are retained for this English entry.
Arabic:
مِسْقَام
(misqām)
— frequently ill
Asturian:
enfermizu
— frequently ill
Asturian:
enxencle
— frequently ill
Asturian:
enxenclu
— frequently ill
Asturian:
esbrixiláu
— frequently ill
Asturian:
delicáu
— frequently ill
Asturian:
achacosu
— frequently ill
Bulgarian:
болнав
(bolnav)
— frequently ill
Catalan:
malaltís
— frequently ill
Catalan:
malaltós
— frequently ill
Catalan:
malaltús
— frequently ill
Dutch:
ziekelijk
— frequently ill
Esperanto:
malsanema
— frequently ill
Finnish:
sairaalloinen
— frequently ill
French:
maladif
— frequently ill
French:
souffreteux
— frequently ill
French:
chétif
— frequently ill
French:
valétudinaire
— frequently ill
Galician:
enfermizo
— frequently ill
German:
kränklich
— frequently ill
German:
fehlbar
— frequently ill
German:
kränkelnd
— frequently ill
German:
siech
— frequently ill
German:
dahinsiechend
— frequently ill
Ancient Greek:
ἄρρωστος
(árrhōstos)
— frequently ill