fu

Name: fu, English Word Data
Creator: Wiktionary
License: https://creativecommons.org/licenses/by-sa/4.0/

intj

By PlainSpell · According to Wiktionary data (CC BY-SA) · analyzed September 3, 2026

The verdict

“fu” sits in 20 confusable pairs (corpus #8,543) as an interjection. The look-alike neighbours are the real trap.

#8,543
frequency rank, English: 2,507
“F” headwords: 20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of fuck you.

Corpus desk

Index EN-fu · fu · English

fu · rank #8,543 · 0 variants · 20 confusables

FREQ-COMMON #8,543
LEN-SHORT 2 letters
VOW-1 1 vowel
CONFUS-HIGH 20 pairs
VAR-0 0 variants
BOOK-MID 2,507
PHOTO-FINISH fourteen

Nearest frequency peer: fourteen (-1 rank slots)

Read with this headword: Spelling guide for this pattern

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.

fools

91,460
fourteen

91,459
fu

91,458
geometry

91,457
GF

91,456
ghosts

91,455

What this shows Bars place “fu” against nearest ranked English headwords, not a reprint of the confusable-pair desk.

Visual similarity to commonly confused words

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

fu vs FW

0% similar

fu vs fy

50% similar

fu vs fun

67% similar

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

Key facts for fu
Property	Value
Headword	fu
Language	English
Part of speech	Interjection
Letters	2
Frequency rank	#8,543
Misspellings tracked	0
Confusable pairs	20
Source	Wiktionary (kaikki.org)

Corpus rank beside confusables of “fu”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).fulands here:

#8,543

#1#100#1K#10K#100K

← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “fourteen” (#8,542), “geometry” (#8,544), “fools” (#8,541). Among 2,507 “F” headwords, “fu” is #8,543. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for fu is neighbouring look-alikes ("FW", "fy", …), not just typos; it is aninterjection. Frequency #8,543 among 2,507 “F” headwords. Gloss: "Initialism of fuck you.".

No misspelling variants are generated for fu in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. It also participates in 20 confusable-pair relationships, "FW", "fy", "fun", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From fuck + you. The correct English form is fu, spelled F-U.

Definition

1
Initialism of fuck you.

Etymology

From fuck + you.

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 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "fu"?

"fu" is spelled F-U.

What does "fu" mean?

As an interjection, "fu" means: Initialism of fuck you.

What words are commonly confused with "fu"?

"fu" is commonly confused with "FW", "fy", "fun". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.

What is the origin of the word "fu"?

From fuck + you. See the full etymology section above for more details.

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.