simplex
/ˈsɪmplɛks/
"simplex" is a 7-letter English headword indexed on PlainSpell.
The verdict
“simplex” has 11 generated spelling variants in the English index at frequency #30,229. The variants make it a useful spelling check.
- #30,229
- frequency rank, English
- 6,566
- “S” headwords
- 11
- tracked misspellings
- 6
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Having a single structure; not composite or complex; undivided, unitary.
Corpus desk
Index EN-simplex · simplex · English
simplex · rank #30,229 · 11 variants · 6 confusables
- FREQ-MID #30,229
- LEN-LONG 7 letters
- VOW-2 2 vowels
- CONFUS-MID 6 pairs
- VAR-MID 11 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH Silvia
Nearest frequency peer: Silvia (-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.
Frequency neighbourhood for “simplex”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- sienna
sienna
69,775 corpus weight
- signifying
signifying
69,774 corpus weight
- Silvia
Silvia
69,773 corpus weight
- simplex
simplex
69,772 corpus weight
- Singaporean
Singaporean
69,771 corpus weight
- sith
sith
69,770 corpus weight
What this shows Bars show where “simplex” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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 | simplex |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˈsɪmplɛks/ |
| Letters | 7 |
| Frequency rank | #30,229 |
| Misspellings tracked | 11 |
| Confusable pairs | 6 |
| Source | Wiktionary (kaikki.org) |
Where “simplex” sits in English frequency
A misspelling magnet
The generator records 11 spelling variants around simplex (IPA /ˈsɪmplɛks/), anadjective. Corpus frequency is #30,229 among 6,566 “S” headwords. Wiktionary lists 7 senses, so context still picks the gloss.
Our generated misspelling index lists 11 likely wrong-spelling variants for simplex, with forms such as "ismplex", "simlpex", and "simmplex". 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 6 confusable-pair relationships, "simply", "simple", "sample", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: The adjective is a learned borrowing from Latin simplex (“plain, simple; single”). The first part, sim-, comes from Proto-Indo-European *sem-, *sm̥- (“one; together”). The second part, -plex, may be from *pleḱ- (“to weave”). The noun is derived from the adj… The correct English form is simplex, spelled S-I-M-P-L-E-X.
Definition
- 1Having a single structure; not composite or complex; undivided, unitary.
- 2Of an eye: (supposedly) having pigment on only the posterior surface of the iris and not the anterior surface, and thus appearing blue; this was later found to be inaccurate, as eye colour is due to the amount of pigment in the anterior surface of the iris; also, of eye pigmentation: present only on the posterior surface of the iris; and of a person: having eyes with this form of pigmentation.
- 3Of a circuit or device: involving signals which travel in one direction at a time; unidirectional.
- 4Of a polyploid organism: having one dominant allele at a given locus on all homologous chromosomes.
- 5Synonym of heterozygous (“of an organism: having two different alleles in a given gene”).
- 6Of a word: having no (derivational) affixes; simple, monomorphemic, uncompounded.
- 7Of an apartment (or, sometimes, another type of property): having only one floor or storey; single-storey.
Etymology
The adjective is a learned borrowing from Latin simplex (“plain, simple; single”). The first part, sim-, comes from Proto-Indo-European *sem-, *sm̥- (“one; together”). The second part, -plex, may be from *pleḱ- (“to weave”). The noun is derived from the adjective. The plural forms simplices and simplicia are learned borrowings from Latin simplicēs (masculine or feminine) and simplicia (neuter), respectively plural forms of simplex. Noun noun sense 1 (“generalization of a triangle or tetrahedron to an arbitrary dimension”) was apparently coined by the Dutch mathematician Pieter Hendrik Schoute (1846–1913) as a short version of Simplicissimum in Mehrdimensionale Geometrie (in German, 1902). (In his pioneering works on algebraic topology, the French mathematician Henri Poincaré (1854–1912) had previously introduced the concept, but not the actual term simplex.)
Common misspellings
Also misspelled as:
- ismplex
- simlpex
- simmplex
- simpelx
- simplexx
- simpllex
- simplxe
- simpplex
- sipmlex
- smiplex
- ssimplex
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of simplex - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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 "simplex"?
What does "simplex" mean?
What words are commonly confused with "simplex"?
How do you pronounce "simplex"?
What is the origin of the word "simplex"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "simplex", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (11 here; floor ≥5).
What to do next
You've looked up "simplex". Here's where to go from here.
- "simplex" maps to 6 confusable pairs in this vintage; the highest-scored is "simply". View pair
- 11 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
- Usage frequency rank #30,229 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "S" letter cohort. S–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
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.