devsdyWhat's the difference?

Quick tell: de is a preposition, dy is an adjective, so they fill different roles in a sentence.

Which to use

“de” is a preposition and “dy” is an adjective - they look or sound alike but fill different roles in a sentence.

#1
“de” frequency rank
#45,564
“dy” frequency rank
45565
confusion score

Side-by-Side Comparison

Feature de dy
Definition Marque un ablatif. Mot indiquant la provenance, l’origine ^([note 1]). Deux.

Where the eye mixes de and dy

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch
de
2 ch
dy

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: de is \də\ while dy is \dy\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - e in “de” becomes y in “dy”, and the parts of speech differ too (preposition vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 45565, derived from the frequency rank of both members and their visual similarity.

de is recorded at frequency rank #1, classified as aprep, pronounced \də\. dy is at rank #45,564, tagged as anadj, pronounced \dy\.

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 45565, this pair ranks #201,757 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of de vs dy

Shared letters: d. Private to "de": e. Private to "dy": y.

"de" · 2 letters · shape CV  ·  "dy" · 2 letters · shape CV

Frequently Asked Questions

Can "de" and "dy" be used interchangeably?
No - they are not even the same part of speech. "de" is a preposition and "dy" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "de" or "dy"?
"de" is the more common of the two: it sits at frequency rank #1 in our French list, against #45,564 for "dy". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list