decidable
[dɪˈsaɪdəbəɫ]adjective
decidable is spelled D-E-C-I-D-A-B-L-E: 9 letters. It appears about once in every 16 million words in written English, the 121,279th most frequent word form (wordfreq, 2021 data). As an adjective, decidable means “capable of being decided” (English Wiktionary, September 2026).
How many letters and syllables are in decidable?
| Letters | 9: D-E-C-I-D-A-B-L-E |
|---|---|
| In writing | about once in every 16 million words; the 121,279th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is decidable?
Decidable appears about once in every 16 million words in written English, the 121,279th 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 decidable?
- UK [dɪˈsaɪdəbəɫ]
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-decidable.ogg, Wikimedia Commons (author and licence on each file's page).
Forms of decidable
- more decidable comparative
- most decidable superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does decidable mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
capable of being decided.
- 2
describing a set for which there exists an algorithm that will determine whether any element is or is not within the set in a finite amount of time.
It is easy to show that the set of even numbers is decidable by creating the relevant Turing machine.
- 3
in intuitionistic logic, a proposition P is decidable in a given theory if it can be proven from the theory that "either P or not P", i.e. in symbols: P∨¬P.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Decidable in Spanish, French, German and Portuguese
In the sense capable of being decided:
| Language | Words |
|---|---|
| German | entscheidbar |
| Spanish | decidible |
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 decidable come from?
From decide + -able.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).