adventitious

/ˌæd.vənˈtɪʃ.əs/

//ˌæd.vənˈtɪʃ.əs// adj

By · According to Wiktionary data (CC BY-SA) ·

"adventitious" is a 12-letter English headword indexed on PlainSpell.

The verdict

“adventitious” is uncommon English (frequency #98,938 among 3,931 “A” headwords), classed as an adjective. The kind of spelling people second-guess.

#98,938
frequency rank, English
3,931
“A” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - From an external source; not innate or inherent, foreign.

Corpus desk

Index EN-adventitious · adventitious · English

adventitious · rank #98,938 · 0 variants · 0 confusables

  • FREQ-RARE #98,938
  • LEN-MEGA 12 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH aetiology

Nearest frequency peer: aetiology (+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 “adventitious”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “adventitious” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for adventitious
PropertyValue
Headwordadventitious
LanguageEnglish
Part of speechAdjective
IPA/ˌæd.vənˈtɪʃ.əs/
Letters12
Frequency rank#98,938
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “adventitious” sits in English frequency

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).adventitious lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

adventitious is uncommon English at frequency #98,938 among 3,931 “A” headwords, classed as anadjective, transcribed /ˌæd.vənˈtɪʃ.əs/. Rarity is why readers land here mid-draft. 4 senses are on record.

No generated misspelling entries exist for adventitious in our index, a sign its spelling follows regular English conventions. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Medieval Latin adventītius (“coming from abroad, extraneous”), a corruption of Latin adventīcius (“foreign, strange, accidental”), from adventus (“arrival, coming, approach, advent”) + -īcius (suffix forming adjectives), from adveniō (“to arrive”) + -t… The correct English form is adventitious, spelled A-D-V-E-N-T-I-T-I-O-U-S.

Definition

  1. 1
    From an external source; not innate or inherent, foreign.
  2. 2
    Accidental, additional, appearing casually.
  3. 3
    Not congenital; acquired.
  4. 4
    Developing in an unusual place or from an unusual source.

Recorded use

Wiktionary examples

These source excerpts show how adventitious appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. In a triad of verbs that admits nothing adventitious, Judah sees, takes, and lies with a woman; […]
  2. The discovery of the art of making pottery was probably in all cases adventitious, the clay being first used for some other purpose.

Etymology

From Medieval Latin adventītius (“coming from abroad, extraneous”), a corruption of Latin adventīcius (“foreign, strange, accidental”), from adventus (“arrival, coming, approach, advent”) + -īcius (suffix forming adjectives), from adveniō (“to arrive”) + -tus (suffix forming action nouns).

This word in other languages

adventicio(Español)acquis(Français)adventício(Português)

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.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "adventitious"?
"adventitious" is spelled A-D-V-E-N-T-I-T-I-O-U-S. The IPA pronunciation is /ˌæd.vənˈtɪʃ.əs/.
What does "adventitious" mean?
As an adjective, "adventitious" means: From an external source; not innate or inherent, foreign.
How do you pronounce "adventitious"?
The IPA (International Phonetic Alphabet) transcription for "adventitious" is /ˌæd.vənˈtɪʃ.əs/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "adventitious"?
From Medieval Latin adventītius (“coming from abroad, extraneous”), a corruption of Latin adventīcius (“foreign, strange, accidental”), from adventus (“arrival, coming, approach, advent”) + -īcius (suffix forming adjectives), from adveniō (“to arr... 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "adventitious", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

unfertilized#98,841therethrough#98,796straightness#98,759straightedge#98,758

What to do next

You've looked up "adventitious". Here's where to go from here.

  • Usage frequency rank #98,938 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "A" letter cohort. A–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.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list