English Idioms with Keep

In this English lesson you will learn some of the main English Idioms with Keep. For example, keep an eye on and keep a straight face.

English Idioms with “Keep” – Learn Their Meanings and Uses

Idioms make English more colorful and natural, and many of them use the verb keep. In this lesson, you’ll discover some of the most common “keep” idioms and how to use them in everyday conversation.

Keep an eye on – This means to watch something or someone carefully. For example: “Can you keep an eye on my bag while I go to the restroom?” It’s perfect when you want someone to look after something for a short time.

Keep a straight face – If you “keep a straight face,” you stay serious and avoid laughing, even when something is funny. For example: “The comedian was so silly that it was hard to keep a straight face.”

Keep in touch – To continue communicating with someone, especially after leaving a place. “Let’s keep in touch after graduation.”

Keep your cool – This means to stay calm under pressure. “She kept her cool during the stressful meeting.”

Keep someone posted – To give someone regular updates about a situation. “I’ll keep you posted on any changes to the schedule.”

Keep your word – To do what you promised. “He said he’d help and he kept his word.”

Notice how all these idioms include the idea of maintaining something: attention, calmness, communication, or a promise.

Here’s a quick tip: idioms often can’t be translated word-for-word into another language. Instead, learn them as whole expressions and practice them in context.

Try using a few today: “I’ll keep an eye on your plants while you’re away,” or “Keep me posted on your travel plans.” Mastering these “keep” idioms will help you sound more natural and confident in English conversations.