abstruse
/əbˈstɹuːs/
"abstruse" is a 8-letter English headword indexed on PlainSpell.
The verdict
“abstruse” is an uncommon English word, ranked #81,076 in English word frequency and used as an adjective.
- #81,076
- frequency rank, English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Difficult to comprehend or understand; obscure.
| Property | Value |
|---|---|
| Headword | abstruse |
| Language | English |
| Part of speech | Adjective |
| IPA | /əbˈstɹuːs/ |
| Letters | 8 |
| Frequency rank | #81,076 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “abstruse” sits in English frequency
Spelling & Dictionary Insight
The English entry for abstruse is 8 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /əbˈstɹuːs/. Corpus data places it at rank #81,076 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our edit-distance generator produced no likely misspellings for abstruse, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: PIE word *h₂epó Learned borrowing from Latin abstrūsus (“concealed, hidden; having been concealed”), an adjective use of the perfect passive participle of abstrūdō (“to conceal, hide; to push or thrust away”), from abs- (from ab- (prefix meaning ‘away; fro… The correct English form is abstruse, spelled A-B-S-T-R-U-S-E.
Definition
- 1Difficult to comprehend or understand; obscure.
- 2Concealed or hidden; secret.
Etymology
PIE word *h₂epó Learned borrowing from Latin abstrūsus (“concealed, hidden; having been concealed”), an adjective use of the perfect passive participle of abstrūdō (“to conceal, hide; to push or thrust away”), from abs- (from ab- (prefix meaning ‘away; from; away from’)) + trūdō (“to push, shove; to thrust”) (ultimately from Proto-Indo-European *trewd- (“to push; to thrust”)). Cognates * Catalan abstrús * German abstrus (“abstruse”) * Italian astruso (“abstruse”) * Middle French abstruse (modern French abstrus, abstruse (“(derogatory, literary) abstruse”) * Portuguese abstruso (“abstruse”) * Spanish abstruso (“abstruse”)
This word in other languages
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 “abstruse”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-B-S-T-R-U-S-E - every other letter order is a misspelling in standard orthography.
- Say it as /əbˈstɹuːs/ (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.