Cool MateComplicated vs Hard to know
When to use each in English, with meaning, register, and examples.
Complicated
Top 2,000 (common)B2adjective
Hard to know
Top 2,000 (common)
| Complicated | Hard to know | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈkɒmplɪkeɪtɪd/"]/🇺🇸 /["/ˈkɑːmplɪkeɪtɪd/"]/ | 🇬🇧 //hɑːd tə nəʊ//🇺🇸 //hɑrd tə noʊ// |
| Meaning | Something that is difficult to understand or deal with. | Difficult to understand or determine. |
| Example | The instructions for assembling the furniture were too complicated for me to follow. | It's hard to know what he really thinks about the situation. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 2,000 (common) |
| CEFR level | B2 | - |
| Part of speech | adjective | |
| Collocations | be, look, seem, extremely, fairly, very | hard to know for sure, hard to know exactly, hard to know the truth |
| Antonyms | simple, easy, straightforward | - |
| Common mistakes | Confusing 'complicated' with 'complex' — they have similar meanings but may be used differently., Using 'complicated' for simple tasks — it's better for things that genuinely have many steps. | Using 'hard to know' instead of 'hard to understand' when discussing comprehension., Confusing it with 'hardly know', which means not knowing much at all., Thinking it can be used in all contexts; it's more casual. |
| Usage notes | Use 'complicated' when describing things that have many parts or are hard to follow. Avoid it in very casual contexts; simpler words like 'hard' may fit better. | Use when discussing uncertainty or complexity. It's informal; avoid in formal writing or presentations. |
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Frequently asked questions: Complicated vs Hard to know
What's the difference between Complicated and Hard to know?
Complicated: Something that is difficult to understand or deal with. Hard to know: Difficult to understand or determine.
Can you show an example of each?
Complicated: The instructions for assembling the furniture were too complicated for me to follow. Hard to know: It's hard to know what he really thinks about the situation.
Can I use Complicated and Hard to know interchangeably?
Not always. Complicated and Hard to know 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.