Cool MateCrucial vs That's the key for him
When to use each in English, with meaning, register, and examples.
Crucial
Top 1,000 (very common)B2adjective
That's the key for him
Top 5,000 (fairly common)
Most common: Crucial
| Crucial | That's the key for him | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈkruːʃl/"]/🇺🇸 /["/ˈkruːʃl/"]/ | 🇬🇧 //ðæts ðə kiː fɔː hɪm//🇺🇸 //ðæts ðə kiː fɔr hɪm// |
| Meaning | very important | It's important for him. |
| Example | It is crucial to finish your homework before the deadline. | That's the key for him to succeed in his career. |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 5,000 (fairly common) |
| CEFR level | B2 | - |
| Part of speech | adjective | |
| Collocations | be, prove, seem, really, very, absolutely, for, to | key to success, key factor, key element, key issue, key player |
| Antonyms | unimportant, trivial, insignificant | - |
| Common mistakes | Using 'crucial' in place of 'critical' in all contexts., Saying 'crucial for to' instead of just 'crucial for'., Confusing 'crucial' with 'crucifix'. | Confused with 'that's key for him' without 'the', Using 'the key to him' inaccurately, 'Key' misused as a physical object instead of meaning important |
| Usage notes | Use 'crucial' for situations that are significantly important, especially in formal contexts. Avoid using it in casual conversations where simpler words like 'important' might fit better. | Commonly used to indicate something vital to a person's success or understanding. Usually informal in speech, but can be used in writing. |
See it in real clips
Frequently asked questions: Crucial vs That's the key for him
What's the difference between Crucial and That's the key for him?
Crucial: very important That's the key for him: It's important for him.
Which is more common: Crucial and That's the key for him?
Crucial is the most common in everyday English.
Can you show an example of each?
Crucial: It is crucial to finish your homework before the deadline. That's the key for him: That's the key for him to succeed in his career.
Can I use Crucial and That's the key for him interchangeably?
Not always. Crucial and That's the key for him 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.