triennial
/tɹaɪˈɛniəl/
"triennial" is a 9-letter English headword indexed on PlainSpell.
The verdict
“triennial” is uncommon English (frequency #53,921 among 3,151 “T” headwords), classed as an adjective. The kind of spelling people second-guess.
- #53,921
- frequency rank, English
- 3,151
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Happening every three years.
Corpus desk
Index EN-triennial · triennial · English
triennial · rank #53,921 · 0 variants · 0 confusables
- FREQ-RARE #53,921
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,151
- PHOTO-FINISH tricolor
Nearest frequency peer: tricolor (-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.
Long-tail ranks near “triennial”
Sparse band: bars invert rank so rarer forms read shorter
- touchpad
touchpad
46,084 corpus weight
- Trajan
Trajan
46,083 corpus weight
- trapdoor
trapdoor
46,082 corpus weight
- tricolor
tricolor
46,081 corpus weight
- triennial
triennial
46,080 corpus weight
- Trondheim
Trondheim
46,078 corpus weight
What this shows Long-tail view: where “triennial” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | triennial |
| Language | English |
| Part of speech | Adjective |
| IPA | /tɹaɪˈɛniəl/ |
| Letters | 9 |
| Frequency rank | #53,921 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “triennial” in English
Rare enough to double-check
triennial is uncommon English at frequency #53,921 among 3,151 “T” headwords, classed as anadjective, transcribed /tɹaɪˈɛniəl/. Rarity is why readers land here mid-draft. 2 senses are on record.
Zero misspellings are on record for triennial in our index, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From Latin triennium (“three-year period”), from tres (“three”) + annus (“year”). By surface analysis, tri- + -ennial. The correct English form is triennial, spelled T-R-I-E-N-N-I-A-L.
Definition
- 1Happening every three years.
- 2Lasting for three years.
Recorded use
Wiktionary examplesThese source excerpts show how triennial appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
triennial elections
They were constantly summoned to a triennial festival : and the most approved songs delivered at this assembly were ordered to be preserved in the custody of the king's historian or antiquary
Etymology
From Latin triennium (“three-year period”), from tres (“three”) + annus (“year”). By surface analysis, tri- + -ennial.
Synonyms
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "triennial", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).