unsound - Master This Word
Master this word with our 5-step learning method – Learn English in English
unsound Word Meanings
- not in good condition
- not based on valid reasoning
- not healthy or safe
unsound Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
unsound Phonetic & Pronunciation
UK
/ʌnˈsaʊnd/
US
/ʌnˈsaʊnd/
unsound Word Etymology
unsound: negative prefix 'un-' + root 'sound'; it originates from Old French 'sond', meaning 'safe' or 'healthy', which comes from Latin 'sonus'. Imagine a beautiful wooden bridge that looks sturdy but collapses when you step on it – that's unsound.
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
Unsound is an adjective used to describe something not in good condition, not based on valid reasoning, or not healthy or safe. It often appears before nouns, as in unsound reasoning, unsound construction, or unsound investment. The word comes from the negative prefix un- attached to sound, with sound originally meaning healthy, solid, or reliable. The sense of not healthy or unsafe sharpened over time, so unsound can refer to a bridge that seems sturdy but collapses when tested, or an argument built on faulty data. In everyday speech you might contrast it with sound, or with unfounded when the issue is special. Context matters: discuss safety, logic, or quality, not a person.
Usage Reminders
- Use with objects, plans, or arguments.
- Contrast with sound to show reliability.
- Do not describe people’s health.
- Pair with unfounded to emphasize lack of evidence.
- Check context: safety, logic, or quality.
- Prefer precise terms in technical writing.
Common Misconceptions
- Unsound does not always mean dangerous; it can refer to faulty logic or poor quality.
- Sound and unsound are about reliability, not volume or audibility.
- Unsound is not a synonym of unsafe; something can be unsound logically but not immediately dangerous.
- Do not use unsound to describe a person’s health.
- Unsound is not a common alternate spelling for unknown reasons; use unfounded for lack of evidence.
Thinking Differences
In English, sound has multiple senses (health, reliability, valid reasoning); learners often mix them. Think about context first: is the focus on health, safety, logic, or quality?
Learning Tips
- Compare unsound with sound to notice subtle differences.
- Practice with three contexts: health, logic, and safety.
- Avoid describing people’s health with unsound.
- Pair with unfounded to emphasize lack of evidence.
- Learn common collocations: unsound reasoning, unsound construction.
- Check the noun after which unsound is placed for clarity.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of the word 'unsound'?
A.Very intelligent
B.Not safe or stable
C.Strong and healthy
D.Useful and practical
Step 2: Usage
Which sentence uses 'unsound' correctly?
A.Her reasoning for that decision was remarkably unsound.
B.The foundation of the building is unsound and needs repair.
C.He gave an unsound presentation, which impressed everyone.
D.The culinary technique was deemed unsound but delicious.
Step 3: Similar Words
Which word is most similar to 'unsound'?
A.Unstable
B.Reasonable
C.Effective
D.Efficient
Step 4: Opposite Words
What is the opposite of 'unsound'?
A.Questionable
B.Stable
C.Weak
D.Erroneous
Step 5: Mastery
Can you think of a real-life situation where something is considered unsound?
A.Many companies fail due to poor financial practices.
B.Healthy eating habits can improve overall wellness.
C.The investment strategy they chose was judged to be unsound.
D.Investing in sustainable energy is highly praised.
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