fía vs fui, What's the Difference?

Which to use

“fía” and “fui” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#40,850
“fía” frequency rank: #852
“fui” frequency rank: 41702
confusion score

Side-by-Side Comparison

Feature	fía	fui
Definition	Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del presente de indicativo de fiar.	Primera persona del singular (yo) del pretérito perfecto simple de indicativo de ser.

Where the spellings diverge

Shared letters are muted; the letters that actually set fía and fui apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch

fía

3 ch

fui

Spelling & Dictionary Insight

A purely visual mix-up. fía ([ˈfia]) and fui ([ˈfwi]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 41702, derived from the frequency rank of both members and their visual similarity.

fía is recorded at frequency rank #40,850, classified as averb, pronounced [ˈfia]. fui is at rank #852, tagged as averb, pronounced [ˈfwi].

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 41702, this pair ranks #152,214 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fía vs fui

Shared letters: f. Private to "fía": aí. Private to "fui": iu.

"fía" · 3 letters · shape CVV · "fui" · 3 letters · shape CVV

Frequency comparison

fía#40,850

fui#852

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "fía" and "fui" be used interchangeably?

No. They are said differently ([ˈfia] versus [ˈfwi]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "fía" or "fui"?

"fui" is the more common of the two: it sits at frequency rank #852 in our Spanish list, against #40,850 for "fía". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering fía vs fui

The fastest way to pick the right one every time.

Read both glosses above and match the meaning you intend, only context separates this pair.
See each word in full, definition, IPA, etymology and its other confusables. Full “fía” entry
Browse more pairs most likely to be confused. Most confusable