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 an uncommon English word, ranked #98,938 in English word frequency and used as an adjective.

#98,938
frequency rank, English
12
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - From an external source; not innate or inherent, foreign.

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

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). adventitious lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for adventitious is 12 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˌæd.vənˈtɪʃ.əs/. Corpus data places it at rank #98,938 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.

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.

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.

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.

Using “adventitious”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is A-D-V-E-N-T-I-T-I-O-U-S - every other letter order is a misspelling in standard orthography.
  • Say it as /ˌæd.vənˈtɪʃ.əs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • 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.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list