perpétuel vs perpétuer, What's the Difference?

Which to use

“perpétuel” is an adjective and “perpétuer” is a verb - they look or sound alike but fill different roles in a sentence.

#17,510
“perpétuel” frequency rank: #20,813
“perpétuer” frequency rank: 38323
confusion score

Side-by-Side Comparison

Feature	perpétuel	perpétuer
Definition	Qui ne cesse pas ; qui dure toujours.	Rendre perpétuel ; faire durer sans cesse, constamment.

Where the spellings diverge

Shared letters are muted; the letters that actually set perpétuel and perpétuer apart are highlighted. They share 8 letters in sequence, which is exactly why the eye skips the difference.

9 ch

perpétuel

9 ch

perpétuer

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: perpétuel is \pɛʁ.pe.tɥɛl\ while perpétuer is \pɛʁ.pe.tɥe\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - l in “perpétuel” becomes r in “perpétuer”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 38323, derived from the frequency rank of both members and their visual similarity.

perpétuel is recorded at frequency rank #17,510, classified as anadj, pronounced \pɛʁ.pe.tɥɛl\. perpétuer is at rank #20,813, tagged as averb, pronounced \pɛʁ.pe.tɥe\.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 38323, this pair ranks #256,073 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of perpétuel vs perpétuer

Shared letters: eprtué. Private to "perpétuel": l. Private to "perpétuer": -.

"perpétuel" · 9 letters · shape CVCCVCVVC · "perpétuer" · 9 letters · shape CVCCVCVVC

Frequency comparison

perpétuel#17,510

perpétuer#20,813

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "perpétuel" and "perpétuer" be used interchangeably?

No - they are not even the same part of speech. "perpétuel" is an adjective and "perpétuer" a verb, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "perpétuel" or "perpétuer"?

"perpétuel" is the more common of the two: it sits at frequency rank #17,510 in our French list, against #20,813 for "perpétuer". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering perpétuel vs perpétuer

The fastest way to pick the right one every time.

Check the role first: if you need an adjective, it's “perpétuel”; for a verb, it's “perpétuer”.
See each word in full, definition, IPA, etymology and its other confusables. Full “perpétuel” entry
Browse more pairs most likely to be confused. Most confusable