retroactive
/ˌɹɛ.tɹoʊˈæk.tɪv/adjective
retroactive is spelled R-E-T-R-O-A-C-T-I-V-E: 11 letters and 4 syllables. It appears about once in every 1 million words in written English, the 31,974th most frequent word form (wordfreq, 2021 data). As an adjective, retroactive means “Extending in scope, effect, application or influence to a prior time or to prior conditions” (English Wiktionary, September 2026).
How many letters and syllables are in retroactive?
| Letters | 11: R-E-T-R-O-A-C-T-I-V-E |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | about once in every 1 million words; the 31,974th most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with |
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); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is retroactive?
Retroactive appears about once in every 1 million words in written English, the 31,974th 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 retroactive?
- UK /ˌɹɛt.ɹəʊˈæk.tɪv/
- US /ˌɹɛ.tɹoʊˈæk.tɪv/
Retroactive has 4 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: En-us-retroactive.ogg, En-au-retroactive.ogg, Wikimedia Commons (author and licence on each file's page).
What rhymes with retroactive?
7 words on PlainSpell end in the same sounds as retroactive from its last stressed vowel (/æktɪv/):
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
What does retroactive mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Extending in scope, effect, application or influence to a prior time or to prior conditions
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Retroactive in Spanish, French, German and Portuguese
In the sense extending in scope, effect, application or influence to a prior time or to prior:
| Language | Words |
|---|---|
| French | rétroactif |
| German | rückwirkend |
| Portuguese | retroativo |
| Spanish | retroactivo |
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 retroactive come from?
First attested in 1610. From French rétroactif, equivalent to retro- + active.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).