sennight
/ˈsɛnaɪt/
"sennight" is a 8-letter English headword indexed on PlainSpell.
The verdict
“sennight” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A period of seven consecutive days and nights; a week.
| Property | Value |
|---|---|
| Headword | sennight |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈsɛnaɪt/ |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “sennight” sits in English frequency
Spelling & Dictionary Insight
The English entry for sennight is 8 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈsɛnaɪt/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
sennight doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From Middle English senight, senyght, sinight (“seven days or nights, a week”) [and other forms], a shortened form of seven-night, sevenight, sevenyght [and other forms], from Late Old English seofeniht (compare seofonnihte (“seven days old; seven days long… The correct English form is sennight, spelled S-E-N-N-I-G-H-T.
Definition
- 1A period of seven consecutive days and nights; a week.
- 2Preceded by a specified day such as Sunday, today, or yesterday: a week from (either before or after) the specified day.
- 3Preceded by a specified day and come: a week after the specified day.
- 4Preceded by a specified day and gone or was: a week before the specified day.
Etymology
From Middle English senight, senyght, sinight (“seven days or nights, a week”) [and other forms], a shortened form of seven-night, sevenight, sevenyght [and other forms], from Late Old English seofeniht (compare seofonnihte (“seven days old; seven days long”, adjective)), from seofon (“seven”) (ultimately from Proto-Indo-European *septḿ̥ (“seven”)) + niht (“night; day (when computing spans of time)”) (ultimately from Proto-Indo-European *nókʷts (“night”)). Doublet of sevennight.
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.
Frequently Asked Questions
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Using “sennight”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is S-E-N-N-I-G-H-T - every other letter order is a misspelling in standard orthography.
- Say it as /ˈsɛnaɪt/ (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.