assiduity
/ˌæs.ɪˈdjuː.ɪ.ti/
"assiduity" is a 9-letter English headword indexed on PlainSpell.
The verdict
“assiduity” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Great and persistent toil or effort.
Corpus desk
Index EN-assiduity · assiduity · English
assiduity · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 9 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "A" thin
- PHOTO-UNK Peer pending
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.
| Property | Value |
|---|---|
| Headword | assiduity |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌæs.ɪˈdjuː.ɪ.ti/ |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “assiduity” in English
Rare enough to double-check
assiduity is uncommon English outside the top frequency list, classed as anoun, transcribed /ˌæs.ɪˈdjuː.ɪ.ti/. Rarity is why readers land here mid-draft. 2 senses are on record.
Our edit-distance generator produced no likely misspellings for assiduity, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From Latin assiduitas, from Latin assiduus. Equivalent to assiduous + -ity. The correct English form is assiduity, spelled A-S-S-I-D-U-I-T-Y.
Definition
- 1Great and persistent toil or effort.
- 2Constant personal attention, solicitous care.
Recorded use
Wiktionary examplesThese source excerpts show how assiduity appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
During the whole time of his abode in the university he generally spent thirteen hours of the day in study; by which assiduity besides an exact dispatch of the whole course of philosophy, he read over in a manner all classic authors that are extant[…]
Her coyneſs was conquered by aſſiduity, and at laſt ſhe conſented to reſign the treaſure of her charms to my paſſion.
Etymology
From Latin assiduitas, from Latin assiduus. Equivalent to assiduous + -ity.
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). See the methodology for how each field is sourced and updated.