idem vs ien, What's the Difference?

Which to use

“idem” is an adverb and “ien” is an article - they look or sound alike but fill different roles in a sentence.

#6,513
“idem” frequency rank: #41,335
“ien” frequency rank: 47848
confusion score

Side-by-Side Comparison

Feature	idem	ien
Definition	De même, pareillement. On l’emploie pour éviter de répéter ce qui vient d’être dit ou écrit.	Un, une

Where the spellings diverge

Shared letters are muted; the letters that actually set idem and ien apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

4 ch

idem

3 ch

ien

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: idem is anadverb and ienanarticle. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 47848, derived from the frequency rank of both members and their visual similarity.

idem is recorded at frequency rank #6,513, classified as anadv, pronounced \i.dɛm\. ien is at rank #41,335, tagged as anarticle.

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 47848, this pair ranks #183,671 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of idem vs ien

Shared letters: ei. Private to "idem": dm. Private to "ien": n.

"idem" · 4 letters · shape VCVC · "ien" · 3 letters · shape VVC

Known mistypes of this pair

idem ← diem · iddem · idemm · idme · iedm

Frequency comparison

idem#6,513

ien#41,335

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "idem" and "ien" be used interchangeably?

No - they are not even the same part of speech. "idem" is an adverb and "ien" an article, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "idem" or "ien"?

"idem" is the more common of the two: it sits at frequency rank #6,513 in our French list, against #41,335 for "ien". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering idem vs ien

The fastest way to pick the right one every time.

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