adjuvant
/ˈæd͡ʒʊv(ə)nt/
"adjuvant" is a 8-letter English headword indexed on PlainSpell.
The verdict
“adjuvant” is a moderately-common English word, ranked #48,043 in English word frequency and used as an adjective.
- #48,043
- frequency rank, English
- 8
- letters
- 12
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Providing assistance or help; assistive, facilitative, helpful.
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 | adjuvant |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˈæd͡ʒʊv(ə)nt/ |
| Letters | 8 |
| Frequency rank | #48,043 |
| Misspellings tracked | 12 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “adjuvant” sits in English frequency
Spelling & Dictionary Insight
The English entry for adjuvant is 8 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˈæd͡ʒʊv(ə)nt/. Corpus data places it at rank #48,043 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 12 likely wrong-spelling variants for adjuvant, with forms such as "addjuvant", "adjjuvant", and "adjuavnt". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 1 confusable-pair relationship, "adjutant", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Learned borrowing from Latin adiuvant-, adjuvant- + English -ant (suffix forming adjectives with the sense ‘exhibiting a condition or process’; and forming agent nouns). Adiuvant-, adjuvant- are oblique stems of adiuvāns, adjuvāns (“assisting, helping”), th… The correct English form is adjuvant, spelled A-D-J-U-V-A-N-T.
Definition
- 1Providing assistance or help; assistive, facilitative, helpful.
- 2Enhancing the immune response to an antigen; also, containing a substance having such an effect.
- 3Of a form of therapy or treatment: additional, supplementary; specifically (oncology), of a cancer treatment: given after removal of a primary tumour.
Etymology
Learned borrowing from Latin adiuvant-, adjuvant- + English -ant (suffix forming adjectives with the sense ‘exhibiting a condition or process’; and forming agent nouns). Adiuvant-, adjuvant- are oblique stems of adiuvāns, adjuvāns (“assisting, helping”), the present active participle of adiuvō (“to assist, help; to be useful; etc.”), from ad- (“prefix meaning ‘to; toward’”) + iuvō (“to aid, help; to save”) (possibly from Proto-Indo-European *h₁ewH- (“to assist, help; to save”)). Adjective adjective sense 3 (“of a form of therapy or treatment: additional, supplementary”) and noun noun sense 1.4 (“additive which aids or modifies the action of the principal ingredient of a drug”) are possibly derived from French adjuvant (adjective, noun).
This word in other languages
Common misspellings
Also misspelled as: addjuvant,adjjuvant,adjuavnt,adjuvannt,adjuvantt,adjuvatn,adjuvnat,adjuvvant,adjvuant,adujvant,ajduvant,dajuvant
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of adjuvant - 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
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Using “adjuvant”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-D-J-U-V-A-N-T - every other letter order is a misspelling in standard orthography.
- Say it as /ˈæd͡ʒʊv(ə)nt/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “adjutant” - see the side-by-side comparison. adjuvant vs adjutant
- 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.