semi-
French, prefix/sə.mi/
semi- is spelled S-E-M-I (4 letters) and appears 17 times per million words in written French, the 4,416th most frequent French word form (wordfreq, 2021 data). Semi- is a French prefix meaning “semi-, demi-, half-” (English Wiktionary, September 2026). The French Wiktionary (Wiktionnaire) defines it as “Indique l’idée de moitié, synonyme : demi-, hémi-, mi-”.
What does semi- mean in English?
prefix
- 1
semi-, demi-, half-
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
prefix: 1. Indique l’idée de moitié, synonyme : demi-, hémi-, mi-. 2. Indique une incomplétude, l’idée de « presque », synonyme : quasi-.
noun: 1. Semi-marathon. 2. Semi-remorque désignant l'ensemble tracteur-remorque. 3. Semi-remorque ne désignant que la remorque.
adverb: 1. Indique une superposition de deux états opposés.
The definition in the French Wiktionary (Wiktionnaire), in French.
Source: French Wiktionary (Wiktionnaire), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of semi-
- semis plural
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce semi-?
- /sə.mi/
- \sə.mi\
Sources: English Wiktionary, French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to semi-
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is semi- in French?
semi- appears 17 times per million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).