Cool MateAssure vs I promise
When to use each in English, with meaning, register, and examples.
Assure
Top 1,000 (very common)B2verb
I promise
Beyond 10,000 (less common)
Most common: Assure
| Assure | I promise | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/əˈʃʊə(r)//əˈʃɔː(r)/","/əˈʃʊəz//əˈʃɔːz/","/əˈʃʊəd//əˈʃɔːd/","/əˈʃʊərɪŋ//əˈʃɔːrɪŋ/"]/🇺🇸 /["/əˈʃʊr/","/əˈʃʊrz/","/əˈʃʊrd/","/əˈʃʊrɪŋ/"]/ | 🇬🇧 //aɪ ˈprɒmɪs//🇺🇸 //aɪ ˈprɑːmɪs// |
| Meaning | To make someone feel sure about something | I will do what I say. |
| Example | I assure you that everything will be fine. | I promise to help you with your project tomorrow. |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Beyond 10,000 (less common) |
| CEFR level | B2 | - |
| Part of speech | verb | |
| Collocations | can, hasten to, of, let me assure you | make a promise, keep a promise, break a promise |
| Antonyms | doubt, disprove, deny | - |
| Common mistakes | Confused with 'ensure' which means to make certain something happens., Using it without a direct object; 'I assure that...' is incorrect., Mixing up 'assure' with 'insure' which relates to insurance. | Confused with 'I promise you' - which adds emphasis., Using it too casually in serious situations. |
| Usage notes | Use 'assure' when you want to promise someone that something is true or will happen. It’s often used in more formal situations. Avoid using it in casual conversations where simpler verbs like 'tell' or 'say' might fit better. | Used in informal and formal contexts to assure someone of a future action. Avoid in sarcastic tones. |
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Frequently asked questions: Assure vs I promise
What's the difference between Assure and I promise?
Assure: To make someone feel sure about something I promise: I will do what I say.
Which is more common: Assure and I promise?
Assure is the most common in everyday English.
Can you show an example of each?
Assure: I assure you that everything will be fine. I promise: I promise to help you with your project tomorrow.
Can I use Assure and I promise interchangeably?
Not always. Assure and I promise 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.