/ˌʌnɹɪˈlaɪəbəl/
unreliable is pronounced /ˌʌnɹɪˈlaɪəbəl/. Unreliable describes something or someone not consistently dependable; capable of failing to meet expectations or to stay accurate, stable, or trustworthy. It often carries a nuance of unpredictability or variability in performance, performance history, or results, suggesting a need for caution or alternative options. In usage, it can refer to people, sources, data, or instruments whose outcomes cannot be wholly trusted.
Say it backUnreliable describes something or someone not consistently dependable; capable of failing to meet expectations or to stay accurate, stable, or trustworthy. It often carries a nuance of unpredictability or variability in performance, performance history, or results, suggesting a need for caution or alternative options. In usage, it can refer to people, sources, data, or instruments whose outcomes cannot be wholly trusted.
"The data from the sensor device turned out to be unreliable, so we had to cross-check with manual measurements."
"Her narrative proved unreliable after several inconsistencies were pointed out in the report."
"We used multiple sources to verify the claim because the original article was unreliable."
You say /ˌʌnˈrʌɪ.ə.bəl/ in US English or /ənˈraɪ.ə.bəl/ in UK; Australia follows /ənˈraɪ.ə.bəl/ as well. The syllable stress centers on the second syllable: un-RI-a-ble, with primary stress on RI in many accents. Start with the unstressed 'un' /ʌn/ or /ən/, move to the stressed /ˈrʌɪ/ (US) or /ˈraɪ/ (UK/AU) and finish with /ə.bəl/ comprising a schwa plus /bəl/. Mouth position: lips neutral to slightly rounded for /r/, tongue high and back for /ɪ/ in /ˈrʌɪ/ or /ˈraɪ/ depending on accent, then a light, relaxed schwa before the final /bəl/.”,
Common errors: misplacing the stress (trying to stress the first syllable as un- or -able), mispronouncing the mid vowel as a pure /ɪ/ or /iː/ instead of the diphthong /ˌʌɪ/ or /aɪ/ in RI, and slurring the final -ble as /bəl/ with a heavy /l/. Correction tips: keep primary stress on the second syllable (un-RI-a-ble), crisp /r/ followed by the diphthong /ʌɪ/ or /aɪ/, and finish with a clear /əbəl/ or /bəl/. Practice with minimal pairs to lock the /riː/ vs /rɪ/ quality and the final schwa.)
US: /ˌʌnˈrʌɪ.ə.bəl/ with a rhotic /r/ and a strong diphthong in RI.UK: /ənˈraɪ.ə.bəl/ with non-rhotic /r/ and a more centralized or clipped /ə/ in the final syllable.AU: /ənˈraɪ.ə.bəl/ similar to UK but with a slightly more pronounced /ɪ/ in the RI syllable depending on speaker. Vowel qualities shift: US tends toward a brighter /ɪ/ in /ˌʌnˈrʌɪ/; UK/AU lean to /aɪ/ in the RI syllable and a flatter /ə/ in -ble. Stress generally remains on RI, but rhythm and vowel length can vary in fast speech across regions.
Because it combines an unstressed prefix un- with a multisyllabic core, a prominent diphthong in RI (/ˌʌnˈrʌɪ.ə/), and a final -ble cluster that can reduce to /bl/ or /bəl/ depending on pace. The middle syllable carries the peak stress, requiring precise tongue advancement for /ˈrʌɪ/ or /ˈraɪ/. Rapid speech can blur vowel quality and syllable boundaries, making it easy to misplace stress or merge sounds. Awareness of the syllable timing and mouth positioning helps stabilize pronunciation.
Unreliable has no silent letters; its challenge lies in the two vowels with diphthongs (/ʌɪ/ or /aɪ/) and the final -ble cluster. The prefix un- is unstressed or lightly stressed, and the -able ending is pronounced with a schwa-like vowel before /bl/. The secondary complication is maintaining the right vowel quality in the RI syllable while not letting the second syllable slide into an /ə/ too soon. Emphasizing the RI syllable and crisp consonant onset helps lock the word’s sound.
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Unreliable comes from the prefix un-, meaning 'not,' attached to reliable. Reliable itself derives from the adjective reliance, which traces to Old French relei… and ultimately Latin reliable “worthy of reliance,” built from Latin reliare “to bind back, rebind” (re- + ligare ‘to bind’). The sense evolution moves from “capable of being relied upon” to its opposite when negated by un-. The earliest uses in English appear in the 15th-16th centuries as a negated form of “reliable.” Over time, the word shifted to describe things whose dependability is questioned, not just absent, embracing nuance like variability, inconsistency, and fragility of performance. In modern usage, unreliability spans data, devices, people’s statements, systems, or processes, often highlighting a pattern rather than a single incident. The word has gained prominence in technology and science reporting, risk assessment, and everyday critique, where a single unreliable data point can undermine trust in an entire source. The semantic field remains centered on trust, consistency, and predictability, with the negative prefix reinforcing the absence or failure of those qualities.
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💡 These words have similar meanings to "unreliable" and can often be used interchangeably.
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Words that rhyme with "unreliable"
-ble sounds
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