bu
[ˈbu]
The verdict
“bu” is a moderately-common Spanish word, ranked #16,776 in Spanish word frequency and used as an interjection.
- #16,776
- frequency rank, Spanish
- 2
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Se usa para asustar a alguien.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | bu |
| Language | Spanish |
| Part of speech | Interjection |
| IPA | [ˈbu] |
| Letters | 2 |
| Frequency rank | #16,776 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “bu” sits in Spanish frequency
Spelling & Dictionary Insight
The Spanish entry for bu is 2 letters long, classified as an interjection, and transcribed in the International Phonetic Alphabet as [ˈbu]. Corpus data places it at rank #16,776 in overall Spanish word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Se usa para asustar a alguien.".
We couldn't generate a plausible misspelling set for bu, typically a sign the spelling maps closely to how the word sounds. It also participates in 20 confusable-pair relationships, "by", "bus", "bue", and more, where similar look or sound leads writers to substitute one word for another in context.
Wiktionary doesn't record an etymology for this headword, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct Spanish form is bu, spelled B-U.
Definition
- 1Se usa para asustar a alguien.
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
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Using “bu”
The practical upshot for anyone who landed here from a spell-check.
- The one correct Spanish spelling is B-U - every other letter order is a misspelling in standard orthography.
- Say it as [ˈbu] (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “by” - see the side-by-side comparison. bu vs by
- Browse more Spanish words and confusable pairs in the same reference. Spanish words
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.