unreliable - Master This Word
Master this word with our 5-step learning method – Learn English in English
unreliable Word Meanings
- not able to be relied upon
- not trustworthy
- inconsistent or changeable
unreliable Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
unreliable Phonetic & Pronunciation
UK
/ʌn.rɪˈlaɪ.ə.bəl/
US
/ˌʌn.rɪˈlaɪ.ə.bəl/
unreliable Word Etymology
un- = not, reliable = trustworthy; from Latin 'reliabilis' → Old French → English. Imagine a broken clock that doesn't tell the right time, symbolizing something you can't depend on.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
Unreliable describes something or someone you cannot depend on. It implies inconsistency, changeability, or a lack of trustworthiness. You might call a friend unreliable if they cancel plans at the last moment; a car that breaks down often is unreliable; or a source whose information keeps changing is unreliable. The etymology comes from un- meaning not and reliable meaning trustworthy, tracing back through Latin reliabilis to Old French and into English. A common metaphor is a broken clock that doesn't tell the right time, or a weather forecast you can't rely on. In everyday use, unreliable contrasts with reliable or dependable, and it can apply to people, data, plans, devices, or systems.
Usage Reminders
- Pair with reliable or dependable to show contrast
- Use with data, plans, sources, or behavior
- Not all 'unreliable' people are 'bad'—it's about trust in a situation
- Watch for 'unreliable + verb' (unreliable to trust, unreliable to act)
- Spelling note: un- + reliable
- Avoid overusing; reserve for clear lapses in trust
Common Misconceptions
- Unreliable = morally bad or dishonest
- Only people can be unreliable
- Unreliable means never works at all
- Reliable and trustworthy are interchangeable in every context
- If a person is unreliable once, they are always unreliable
Thinking Differences
English speakers often focus on whether something or someone can be trusted in a concrete situation; learners may mix unreliable with 'untrustworthy' in moral judgments, or overgeneralize to people. Think of reliability as a feature of a situation, not a fixed trait.
Learning Tips
- Study reliable vs unreliable pairs in context
- Make lists: unreliable data, unreliable source, unreliable plan
- Notice collocations with verbs: prove, become, feel
- Practice with real-world examples from news or tech
- Memorize prefix un- and how it changes meaning
- Record and compare sentences to track nuance
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of 'unreliable'?
A.Dependable
B.Untrustworthy
C.Supportive
D.Consistent
Step 2: Usage
In which sentence is 'unreliable' used correctly?
A.She is always on time, very reliable.
B.You can't count on him, he is unreliable.
C.His car is old but reliable.
D.The weather forecast was accurate and reliable.
Step 3: Similar Words
Which word is an antonym of 'unreliable'?
A.Inconsistent
B.Predictable
C.Faithful
D.Trustworthy
Step 4: Opposite Words
In what real-life situation would being 'unreliable' be a problem?
A.Maintaining good grades in school
B.Keeping promises to friends
C.Meeting deadlines at work
D.Following a healthy diet
Step 5: Mastery
Reflect on a time when you experienced someone who was 'unreliable'.
A.Family member
B.Co-worker
C.Friend
D.Classmate
Related Listening
🔥 Advanced
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