fo

[ˈfo]

/[ˈfo]/ intj

The verdict

“fo” sits in 20 confusable pairs (corpus #20,044) as an interjection. The look-alike neighbours are the real trap.

#20,044
frequency rank, Spanish
2,333
“F” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Expresión usada al percibir mal olor o sabor.

Corpus desk

Index ES-fo · fo · Spanish

fo · rank #20,044 · 0 variants · 20 confusables

  • FREQ-MID #20,044
  • LEN-SHORT 2 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 2,333
  • PHOTO-FINISH Florence

Nearest frequency peer: Florence (-1 rank slots)

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Vecinos de frecuencia del confusable “fo”

Pares de peso similar en el corpus, aparte de los confusables abajo

corpus weight

What this shows Las barras sitúan “fo” frente a los lemas españoles más cercanos por rango, no un reprint del escritorio de confusables.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

fo vs FP
0% similar
fo vs fue
33% similar
fo vs fui
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for fo
PropertyValue
Headwordfo
LanguageSpanish
Part of speechInterjection
IPA[ˈfo]
Letters2
Frequency rank#20,044
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Rango de corpus junto a confusables de “fo”

Esta escala corre desde el núcleo del español cotidiano (izquierda) hasta el rastro de formas rara vez usadas (derecha).focae aquí:

#1#100#1K#10K#100K
← used constantlyrarely used →

Los ticks avanzan en logaritmo; cada uno es del orden de diez veces más raro. En la misma franja de rareza aparecen “Florence” (#20,043), “focus” (#20,045), “fingiendo” (#20,042). Entre 2,333 lemas con “F”, “fo” va en #20,044. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for fo is neighbouring look-alikes ("FP", "fue", …), not just typos; it is aninterjection pronounced [ˈfo]. Frequency #20,044 among 2,333 “F” headwords. Gloss: "Expresión usada al percibir mal olor o sabor.".

fo doesn't appear in our generated misspelling index, a sign its spelling follows regular Spanish conventions. It also participates in 20 confusable-pair relationships, "FP", "fue", "fui", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

No borrowing history is documented for this entry, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct Spanish form is fo, spelled F-O.

Definition

  1. 1
    Expresión usada al percibir mal olor o sabor.

Synonyms

fúchilafuchi

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 Spanish corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "fo"?
"fo" is spelled F-O. The IPA pronunciation is [ˈfo].
What does "fo" mean?
As an interjection, "fo" means: Expresión usada al percibir mal olor o sabor.
What words are commonly confused with "fo"?
"fo" is commonly confused with "FP", "fue", "fui". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "fo"?
The IPA (International Phonetic Alphabet) transcription for "fo" is [ˈfo]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "fo" come from?
"fo" is a Spanish word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

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

Source: FrequencyWords open word-frequency list