Cool MateChilly vs Cool
When to use each in English, with meaning, register, and examples.
Chilly
Top 2,000 (common)
Cool
InformalTop 1,000 (very common)A1adjective
Most formal: ChillyMost common: Cool
| Chilly | Cool | |
|---|---|---|
| Pronunciation | 🇬🇧 //ˈtʃɪli//🇺🇸 //ˈtʃɪli// | 🇬🇧 /["/kuːl/"]/🇺🇸 /["/kuːl/"]/ |
| Meaning | A word to describe very cool or cold weather. | Something that is good or impressive. |
| Example | It was a chilly morning, and I needed my coat. | The weather is really cool today. |
| Register | Neutral | Informal |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | - | A1 |
| Part of speech | adjective | |
| Collocations | chilly weather, chilly breeze, chilly night | be, feel, look, very, a little, slightly, be, look, sound, extremely, fairly, very, be, look, sound, extremely, fairly, very, appear, be, look, very, pretty, about, with, cool, calm and collected, act, appear, be, distinctly, very, rather, about, towards/toward, appear, be, look, very, pretty, about, with, cool, calm and collected |
| Antonyms | warm, hot, toasty | uncool, boring, uninteresting |
| Common mistakes | Confused with 'cool' – 'chilly' is colder than 'cool'., Using 'chilly' to describe things other than temperature, like emotions., Incorrectly capitalizing 'Chilly' when describing the weather. | Using 'cool' to describe temperatures or weather instead of mood or style., Confusing 'cool' with 'great' in contexts where a specific feeling is implied., Overusing 'cool' in formal or academic situations where more precise vocabulary is needed. |
| Usage notes | Use 'chilly' to describe uncomfortable coolness, often related to weather. It is polite and suitable in most contexts, but not used for extreme cold. | Use 'cool' to describe things that are stylish or admirable. It's very informal, so avoid it in formal writing or conversations. Can imply calmness in some contexts. |
See it in real clips
Frequently asked questions: Chilly vs Cool
What's the difference between Chilly and Cool?
Chilly: A word to describe very cool or cold weather. Cool: Something that is good or impressive.
Which is more formal: Chilly and Cool?
Chilly is the most formal of these.
Which is more common: Chilly and Cool?
Cool is the most common in everyday English.
Can you show an example of each?
Chilly: It was a chilly morning, and I needed my coat. Cool: The weather is really cool today.
Can I use Chilly and Cool interchangeably?
Not always. Chilly and Cool 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.