infra
/ˈɪn.fɹə/
"infra" is a 5-letter English headword indexed on PlainSpell.
The verdict
“infra” is a moderately-common English word, ranked #32,864 in English word frequency and used as an adverb.
- #32,864
- frequency rank, English
- 5
- letters
- 7
- tracked misspellings
- 14
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Discussed later.
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 | infra |
| Language | English |
| Part of speech | Adverb |
| IPA | /ˈɪn.fɹə/ |
| Letters | 5 |
| Frequency rank | #32,864 |
| Misspellings tracked | 7 |
| Confusable pairs | 14 |
| Source | Wiktionary (kaikki.org) |
Where “infra” sits in English frequency
Spelling & Dictionary Insight
The English entry for infra is 5 letters long, classified as an adverb, and transcribed in the International Phonetic Alphabet as /ˈɪn.fɹə/. Corpus data places it at rank #32,864 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Discussed later.".
Our generated misspelling index lists 7 likely wrong-spelling variants for infra, with forms such as "ifnra", "infar", and "inffra". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 14 confusable-pair relationships, "IRA", "inga", "inna", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: Borrowed from Latin infra (“below”). The correct English form is infra, spelled I-N-F-R-A.
Definition
- 1Discussed later.
Etymology
Borrowed from Latin infra (“below”).
Antonyms
Common misspellings
Also misspelled as: ifnra,infar,inffra,infrra,innfra,inrfa,nifra
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of infra - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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
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Using “infra”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-F-R-A - every other letter order is a misspelling in standard orthography.
- Say it as /ˈɪn.fɹə/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “IRA” - see the side-by-side comparison. infra vs IRA
- Browse more English words and confusable pairs in the same reference. English 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.