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HomeWhich One?SpellingPeak vs Peek
ESEN
Which one to use?Intermediatenounverb / noun

PeakvsPeek

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

Side-by-side comparison

Peak
noun

"Peak" is the highest point: a mountain top, the most intense moment, or the maximum level of something. "Peak hours" = the busiest period. "At its peak" = at its highest or most successful point.

  • 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

"Peek" is to look quickly and secretly through a small opening or from behind cover. "Take a peek" = have a brief, furtive look. "Peek-a-boo" = the baby game of hiding and suddenly reappearing.

  • 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 chart" when meaning a quick look is wrong (correct: peek).
  • •And "The graph shows a peek in July" when meaning the highest value is wrong (correct: peak).

Trick to remember it

  • •"Peek" has double E, imagine two little eyes peeking (EE = two eyes).
  • •"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?

PEEK/PEAK/PIQUE is a trio of homophones where all three have completely different meanings and different vocabulary levels: PEEK is basic, PEAK is everyday, and PIQUE is advanced vocabulary. The expression "it peaked my interest", a blend of PEAK and PIQUE, is one of the most common errors in high-level native English writing. Autocorrect software generally does not flag it because "peaked" is a valid word and the semantic context is hard to detect algorithmically. Only a human reader who knows all three words can catch this error.

Practise what you learned

Exercise 1 · Pick the right one

No looking! Don't even _____ at your birthday present before the party.

Exercise 2 · Pick the right one

The tourist season reaches its _____ in August when the hotels are completely full.

Exercise 3 · Form the word

Complete: "She _____ ed through the curtain to see who was outside." (peaked / peeked)

Related word pairs

AcceptvsExcept

One means to receive or agree to something, the other means to exclude or not include.

AdvicevsAdvise

'Advice' is the guidance you receive (noun); 'advise' is the act of giving that guidance (verb).

AffectvsEffect

'Affect' is the verb meaning to influence something; 'effect' is the noun meaning result or consequence.

AislevsIsle

'Aisle' is the walkway between rows of seats or shelves; 'isle' is a small island.

BL

Bryan López

Founder of SpeakUP Academy

July 29, 2026

See all Spelling pairsExplore English suffixes
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