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Which one to use?Intermediatenoun / verb / adjectiveverb / noun

peakvspeek

'Peak' is the top, highest point, or best moment; 'peek' means to look quickly and secretly.

Side-by-side comparison

peak
noun / verb / adjective

Noun/verb/adjective. The pointed top of a mountain. The highest point or moment of greatest intensity. Also: to reach maximum value.

  • Web traffic reached its peak during the product launch week.

  • She climbed to the peak of the mountain at sunrise.

  • Demand typically peaks in December and drops sharply in January.

peek
verb / noun

Verb/noun. To look quickly and secretly through a small opening. A brief, furtive look.

  • He peeked through the window to see if the lights were on.

  • She took a quick peek at the answers before the test.

  • Don't peek — it's a surprise!

Common mistake

"Take a peak at this" when meaning a quick look (correct: peek). Or "The graph shows a peek in July" when meaning the highest value (correct: peak).

Trick to remember it

'Peek' has double E — imagine two little eyes peeking (EE = 👀). 'Peak' has EA going up — like a mountain shape with the A rising to a point.

Quick rule

Is it the highest point, top, or maximum? 'Peak'. Is it a quick, secret look? 'Peek'.

Did you know?

There is a third homophone: 'pique' (from French), meaning to provoke interest or irritation. 'It piqued my curiosity' is correct — not 'peaked' or 'peeked'. 'Peaked my interest' is one of the most common eggcorn errors in native English writing. All three — peak, peek, pique — sound identical in most accents, making this the hardest spelling trio after to/too/two.

Practise what you learned

Exercise 1 · Pick the right one

Revenue hit its _____ in Q4 before declining sharply in the new year.

Exercise 2 · Pick the right one

She _____ at the gift under the tree before anyone was awake.

Exercise 3 · Form the word

Peak or peek? "Can I take a _____ at the prototype before the presentation?" Write the correct word.

Hint: This is a quick, secret or early look at something — not the highest point.

Frequently asked questions

When do I use "peak" and when do I use "peek"?

Is it the highest point, top, or maximum? 'Peak'. Is it a quick, secret look? 'Peek'.

What is the most common mistake with "peak" and "peek"?

"Take a peak at this" when meaning a quick look (correct: peek). Or "The graph shows a peek in July" when meaning the highest value (correct: peak).

How do I remember the difference between "peak" and "peek"?

'Peek' has double E — imagine two little eyes peeking (EE = 👀). 'Peak' has EA going up — like a mountain shape with the A rising to a point.

BL

Bryan López

Founder of SpeakUP Academy

July 29, 2026

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