unsure
adjective
unsure is spelled U-N-S-U-R-E: 6 letters and 2 syllables. It appears 5.6 times per million words in written English, the 10,358th most frequent word form (wordfreq, 2021 data). As an adjective, unsure means “uncertain, ambivalent” (English Wiktionary, September 2026).
How many letters and syllables are in unsure?
| Letters | 6: U-N-S-U-R-E |
|---|---|
| Syllables | 2 (from its American pronunciation) |
| In writing | 5.6 times per million words; the 10,358th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is unsure?
Unsure appears 5.6 times per million words in written English, the 10,358th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce unsure?
Unsure has 2 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-unsure.wav, Wikimedia Commons (author and licence on each file's page).
Forms of unsure
- unsurer comparative
- unsurest superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does unsure mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
uncertain, ambivalent.
I'm still unsure whether to attend the wedding.
- 2
unstable or precarious
unsure footing
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Unsure in Spanish, French, German and Portuguese
In the sense uncertain:
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does unsure come from?
From Middle English unsure, equivalent to un- + sure. Piecewise doublet of insecure and unsecure.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).