u

[u]

/[u]/ character

By · According to Wiktionary data (CC BY-SA) ·

The verdict

“u” sits in 20 confusable pairs (corpus #648) as a character. The look-alike neighbours are the real trap.

#648
frequency rank, Spanish
448
“U” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Vigesimosegunda letra del alfabeto español y quinta vocal. Su nombre es u₂.

Corpus desk

Index ES-u · u · Spanish

u · rank #648 · 0 variants · 20 confusables

  • FREQ-CORE #648
  • LEN-SHORT 1 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 448
  • PHOTO-FINISH septiembre

Nearest frequency peer: septiembre (-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.

Frequency neighbourhood for “u”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “u” sits against the nearest ranked Spanish headwords in the FrequencyWords band, not a reprint of letter-browse containment.

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).

u vs un
50% similar
u vs us
50% similar
u vs up
50% similar

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

Key facts for u
PropertyValue
Headwordu
LanguageSpanish
Part of speechCharacter
IPA[u]
Letters1
Frequency rank#648
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Dónde se sitúa “u” en la frecuencia del español

La frecuencia va del puñado de palabras que usamos sin parar (izquierda) a la cola larga que apenas aparece (derecha).ucae 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 “septiembre” (#647), “usar” (#649), “plaza” (#646). Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for u is neighbouring look-alikes ("un", "us", …), not just typos; it is acharacter pronounced [u]. Frequency #648 among 448 “U” headwords. Gloss: "Vigesimosegunda letra del alfabeto español y quinta vocal. Su nombre es u₂.".

u has no tracked misspelling variants, suggesting the orthography follows predictable Spanish patterns. It also participates in 20 confusable-pair relationships, "un", "us", "up", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

No documented word history exists for this headword, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct Spanish form is u, spelled U.

Definition

  1. 1
    Vigesimosegunda letra del alfabeto español y quinta vocal. Su nombre es u₂.

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 "u"?
"u" is spelled U. The IPA pronunciation is [u].
What does "u" mean?
As a character, "u" means: Vigesimosegunda letra del alfabeto español y quinta vocal. Su nombre es u₂.
What words are commonly confused with "u"?
"u" is commonly confused with "un", "us", "up". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "u"?
The IPA (International Phonetic Alphabet) transcription for "u" is [u]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "u" come from?
"u" 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.

What to do next

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PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list