One English word, several Japanese ones
Before choosing a word, decide which cool you mean. The three main meanings, stylish, slightly cold and calm, have no overlap in Japanese.
| What you mean | Japanese word | Example situation |
|---|---|---|
| Stylish, impressive, attractive | Kakkoii | A great car, a good-looking outfit |
| Pleasantly cool air | Suzushii | An autumn evening, a shaded room |
| Cold to the touch | Tsumetai | A cold drink, cold hands |
| Cold weather | Samui | A winter morning |
| Calm and composed | Reisei | Staying calm in an emergency |
If you remember nothing else, remember that kakkoii never describes temperature and suzushii never describes style.
Kakkoii: stylish and impressive
Kakkoii covers cars, clothes, music, design, people and actions. It can mean good-looking about a person and admirable about behaviour, such as someone who stands up for a friend.
It conjugates like ii, which trips up many learners. The opposite, kakko warui, is equally useful and covers both uncool and embarrassing.
| Japanese | Romaji | Meaning |
|---|---|---|
| かっこいい車ですね。 | Kakkoii kuruma desu ne. | That is a cool car. |
| かっこいい！ | Kakkoii! | So cool! |
| 昨日のライブ、かっこよかった！ | Kinō no raibu, kakkoyokatta! | Last night's gig was so cool! |
| このデザイン、かっこよくない？ | Kono dezain, kakkoyokunai? | Isn't this design cool? |
| 転んで、かっこ悪かった。 | Koronde, kakko warukatta. | I tripped, it was so embarrassing. |
Sugoi, oshare and good taste
Sometimes cool means impressive rather than stylish, and sugoi is the natural reaction. When cool means fashionable or tasteful, oshare is often the better choice, especially for clothes, cafés and interiors.
Sensu ga ii, good sense, praises someone's taste and is a friendly compliment for how a person dresses or decorates.
| Japanese | Romaji | Meaning |
|---|---|---|
| すごい！ | Sugoi! | That is amazing! |
| おしゃれなカフェですね。 | Oshare na kafe desu ne. | What a stylish café. |
| その服、おしゃれだね。 | Sono fuku, oshare da ne. | Those clothes are stylish. |
| センスがいいですね。 | Sensu ga ii desu ne. | You have great taste. |
Slang to recognise
Iketeru means cool or on point in casual speech. It was very popular and still appears, but it can sound slightly dated. Ikemen, a handsome man, is widely used and not dated at all.
The loanword kūru exists but mostly describes a calm, composed, even aloof personality or a sleek design. Yabai also gets used for cool, but its range is wide and its origins negative, so it is best understood before it is used.
| Japanese | Romaji | Meaning |
|---|---|---|
| イケてる | iketeru | Cool, stylish (casual, slightly dated) |
| イケメン | ikemen | A good-looking man |
| クールな人 | kūru na hito | A calm, composed, reserved person |
| やばい！ | Yabai! | Amazing! or Uh-oh! depending on context |
Cool weather: suzushii, samui and tsumetai
For temperature, Japanese distinguishes air from objects. Suzushii is pleasantly cool air and is always positive, the relief of a breeze in summer. Samui is cold air or weather and is usually unwelcome.
Tsumetai describes things that are cold to the touch: drinks, water, hands. To make something cool, the verb is hiyasu.
| Japanese | Romaji | Meaning |
|---|---|---|
| 今日は涼しいですね。 | Kyō wa suzushii desu ne. | It is nice and cool today. |
| 朝は寒いです。 | Asa wa samui desu. | It is cold in the mornings. |
| 冷たい飲み物をください。 | Tsumetai nomimono o kudasai. | A cold drink, please. |
| ビールを冷やしておいて。 | Bīru o hiyashite oite. | Put the beer in to chill. |
| 涼しい顔をしている。 | Suzushii kao o shite iru. | He is acting as if nothing is wrong. |
Keeping cool: reisei and ochitsuite
When cool means calm under pressure, the noun reisei and the verb ochitsuku take over. Reisei na hito is someone who keeps a clear head, and reisei ni is how you do something calmly.
Be careful with tsumetai for people. Tsumetai hito means someone cold, unfriendly or unkind, which is the opposite of the compliment you might have intended.
| Japanese | Romaji | Meaning |
|---|---|---|
| 冷静に考えましょう。 | Reisei ni kangaemashō. | Let's think about this calmly. |
| 彼はいつも冷静です。 | Kare wa itsumo reisei desu. | He always keeps a cool head. |
| 落ち着いて。 | Ochitsuite. | Calm down. |
| 冷たい人 | tsumetai hito | A cold, unkind person |
Practising the switch
The errors with cool are rarely about not knowing the words. They happen when English automatically offers one word for several situations and you translate it without deciding which meaning you want.
Short, varied conversations are the best practice: a friend shows you something, the weather changes, a small problem needs a calm response. Conversations with your AI Sensei mix these naturally, and the learn-by-playing games keep the new words fresh, while saying kakkoyokatta aloud a few times is what makes the conjugation come out without thinking.
- Stylish or impressive: kakkoii.
- Pleasant air: suzushii. Cold objects: tsumetai.
- Calm: reisei. Never tsumetai for a person you admire.
- Kakkoii conjugates on yo: kakkoyokatta.