adj · noun · 6 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
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Received-Pronunciation:/ˌʌn.ɹɪˈlaɪ.ə.bl̩/
Received-Pronunciation:/ʌn.ɹɪˈlaɪ.ə.bl̩/
General-American:/ˌʌn.ɹəˈlaɪ.ə.bəl/
US:Recorded audio is listed in the source snapshot.
rhymes with -aɪəbəl
CMU ARPABET:AH2 N R IH0 L AY1 AH0 B AH0 L
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
CMU ARPABET 2:AH2 N R IY0 L AY1 AH0 B AH0 L
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Not reliable.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: flakey, sporadic, undependable
Antonyms: reliable
2
noun
Meaning 2
One who or that which cannot be relied upon.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adjective
Meaning 3
not worthy of reliance or trust
Definition source: Princeton WordNet 3.0
Examples
in the early 1950s computers were large and expensive and unreliable
an undependable assistant
Meaning relationships
Synonyms: undependable
Antonyms: reliable
4
adjective satellite
Meaning 4
liable to be erroneous or misleading
Definition source: Princeton WordNet 3.0
Examples
an undependable generalization
Meaning relationships
Synonyms: undependable
Antonyms: none provided
5
adjective satellite
Meaning 5
lacking a sense of responsibility
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
adjective satellite
Meaning 6
dangerously unstable and unpredictable
Definition source: Princeton WordNet 3.0
Examples
treacherous winding roads
an unreliable trestle
Meaning relationships
Synonyms: treacherous
Antonyms: none provided
History
Etymology
From un- + reliable.
Across languages
Translations
56 source translations are retained for this English entry.
Albanian:
i pasigurt
— not reliable
Azerbaijani:
etibarsız
— not reliable
Basque:
ganoragabe
— not reliable
Basque:
ganorabako
— not reliable
Belarusian:
ненадзе́йны
(njenadzjéjny)
— not reliable
Bulgarian:
ненадежден
(nenadežden)
— not reliable
Chinese Mandarin:
不可靠的
— not reliable
Czech:
nespolehlivý
— not reliable
Danish:
upålidelig
— not reliable
Dutch:
onbetrouwbaar
— not reliable
Esperanto:
nefidinda
— not reliable
Finnish:
epäluotettava
— not reliable
French:
non fiable
— not reliable
French:
à qui on ne peut pas se fier
— not reliable
German:
unzuverlässig
— not reliable
Greek:
αναξιόπιστος
(anaxiópistos)
— not reliable
Haitian Creole:
infidèl
— not reliable
Hungarian:
megbízhatatlan
— not reliable
Icelandic:
óáreiðanlegur
— not reliable
Irish:
abhógach
— not reliable
Irish:
ainfhéichiúnta
— not reliable
Irish:
feillbhéasach
— not reliable
Irish:
neamhchoinníollach
— not reliable
Irish:
neamhiontaofa
— not reliable
Irish:
neamh-mhuiníneach
— not reliable
Italian:
inaffidabile
— not reliable
Kazakh:
сенімсіз
(senımsız)
— not reliable
Kazakh:
тұрақсыз
(tūraqsyz)
— not reliable
Macedonian:
недо́верлив
(nedóverliv)
— not reliable
Macedonian:
нена́дежен
(nenádežen)
— not reliable
Macedonian:
неси́гурен
(nesíguren)
— not reliable
Māori:
kahurakiraki
— not reliable
Māori:
māngina
— not reliable
Māori:
hārakiraki
— not reliable
Māori:
hurori
— not reliable
Māori:
kōnukenuke
— not reliable
Māori:
kahurangi
— not reliable
Māori:
mōngina
— not reliable
Māori:
hārekereke
— not reliable
Norwegian Bokmål:
upålitelig
— not reliable
Norwegian Nynorsk:
upåliteleg
— not reliable
Plautdietsch:
onbestendich
— not reliable
Polish:
nierzetelny
— not reliable
Polish:
awaryjny
— not reliable
Portuguese:
não confiável
— not reliable
Portuguese:
inconfiável
— not reliable
Russian:
ненадёжный
(nenadjóžnyj)
— not reliable
Russian:
неблагонадёжный
(neblagonadjóžnyj)
— not reliable
Serbo-Croatian:
nepouzdan
— not reliable
Spanish:
no / poco / nada fiable / confiable
— not reliable
Swedish:
opålitlig
— not reliable
Tocharian B:
empakwatte
— not reliable
Turkish:
güvenilmez
— not reliable
Ukrainian:
ненаді́йний
(nenadíjnyj)
— not reliable