Cool MateIs a mystery vs Problem
When to use each in English, with meaning, register, and examples.
Is a mystery
Top 2,000 (common)
Problem
Top 1,000 (very common)A1noun
Most common: Problem
| Is a mystery | Problem | |
|---|---|---|
| Pronunciation | 🇬🇧 //ɪz ə ˈmɪstəri//🇺🇸 //ɪz ə ˈmɪstəri// | 🇬🇧 /["/ˈprɒbləm/"]/🇺🇸 /["/ˈprɑːbləm/"]/ |
| Meaning | Something that is not known or understood. | A difficulty or issue that needs to be solved. |
| Example | Her past is still a mystery to me. | Math can be hard, but I will solve this problem. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | - | A1 |
| Part of speech | noun | |
| Collocations | remain a mystery, solve a mystery, still a mystery, is a complete mystery, an intriguing mystery | acute, big, enormous, host, set, be, pose, present (somebody with), arise, come up, crop up, area, spot, behaviour/behavior, problem about, problem for, problem of, an approach to a problem, the crux of the problem, the heart of the problem, complicated, difficult, easy, do, find the answer to, solve, set |
| Antonyms | - | solution, answer, resolution |
| Common mistakes | Used with clear information, which contradicts the meaning., Misused in questions where the mystery is actually solved., Confused with 'mystery' as a genre in literature. | 'Problem' is often confused with 'trouble'—these words have slightly different meanings., Some learners may use 'problems' incorrectly with uncountable nouns., Use the phrase 'to solve a problem' instead of 'to fix a problem'. |
| Usage notes | Used to express confusion or lack of clarity. Appropriate in both spoken and written English. Avoid in overly formal contexts. | Use 'problem' in both formal and informal contexts. Avoid using in overly casual situations when a lighter term might fit, like 'issue' or 'challenge'. |
See it in real clips
Frequently asked questions: Is a mystery vs Problem
What's the difference between Is a mystery and Problem?
Is a mystery: Something that is not known or understood. Problem: A difficulty or issue that needs to be solved.
Which is more common: Is a mystery and Problem?
Problem is the most common in everyday English.
Can you show an example of each?
Is a mystery: Her past is still a mystery to me. Problem: Math can be hard, but I will solve this problem.
Can I use Is a mystery and Problem interchangeably?
Not always. Is a mystery and Problem are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.