sui: meaning, definition, pronunciation and examples
C1/C2 - Very Low FrequencyFormal, Academic, Legal, Technical
Quick answer
What does “sui” mean?
A hyphenated prefix element found almost exclusively in the Latin phrase 'sui generis' meaning 'of its own kind.
Audio
Pronunciation
Definition
Meaning and Definition
A hyphenated prefix element found almost exclusively in the Latin phrase 'sui generis' meaning 'of its own kind; unique'.
In modern legal, philosophical, and academic English, used primarily as part of the fixed Latin expression 'sui generis' to describe something so unique that it constitutes a category of its own, not comparable to other things. Rarely, it may be seen in other Latin compounds like 'sui juris' (of one's own right). It is not an independent English word.
Dialectal Variation
British vs American Usage
Differences
No significant difference in usage or preference. The phrase 'sui generis' is used identically in both legal and academic contexts.
Connotations
Connotes erudition, precision, and a classical education. Can sometimes be used pejoratively to imply unnecessary jargon.
Frequency
Equally rare in both varieties, confined to specific professional or intellectual fields.
Grammar
How to Use “sui” in a Sentence
[be] + considered + sui generis[be] + regarded as + sui generisa + [noun] + that is + sui generisVocabulary
Collocations
Examples
Examples of “sui” in a Sentence
adjective
British English
- The legal status of the Crown is considered sui generis.
American English
- The artist's work is truly sui generis, defying all genres.
Usage
Meaning in Context
Business
Virtually never used. Might appear in high-level strategy documents to describe a unique market position or business model.
Academic
Common in legal, philosophical, literary, and cultural studies to describe phenomena that defy standard classification.
Everyday
Extremely rare. Would sound pretentious in casual conversation.
Technical
Used in law (e.g., 'sui generis rights' in intellectual property), taxonomy, and philosophy.
Vocabulary
Synonyms of “sui”
Vocabulary
Antonyms of “sui”
Watch out
Common Mistakes When Using “sui”
- Using 'sui' alone as a word (e.g., 'It's very sui.' – Incorrect).
- Misspelling as 'sue generis' or 'sui generus'.
- Overusing the term in informal contexts where 'unique' would suffice.
- Incorrect pronunciation: /suː-ai/ instead of /suː.i/.
FAQ
Frequently Asked Questions
No. 'Sui' is not an independent English word. It only has meaning as part of the fixed Latin phrase 'sui generis' or similar legal phrases like 'sui juris'.
It is a stronger, more formal synonym. 'Sui generis' implies not just uniqueness but that the thing constitutes its own category or class, making comparison impossible.
It is pronounced /ˌsuː.iː ˈdʒɛn.ər.ɪs/ (UK) or /ˌsuː.i ˈdʒen.ər.ɪs/ (US). The 'sui' sounds like 'soo-ee', with a slight pause between syllables.
It is standard practice to italicize Latin phrases that are not fully assimilated into English. 'Sui generis' is often italicized in formal academic and legal writing, but in many modern contexts, the italics are omitted.
A hyphenated prefix element found almost exclusively in the Latin phrase 'sui generis' meaning 'of its own kind.
Sui is usually formal, academic, legal, technical in register.
Phrases
Idioms & Phrases
- “sui generis (the only idiom/phrase)”
Learning
Memory Aids
Mnemonic
Think 'Sue E.' has a GENERIS (genius) that is uniquely her own – SUI GENERIS.
Conceptual Metaphor
CATEGORY IS A CONTAINER / UNIQUENESS IS ISOLATION. Something 'sui generis' is in a container all by itself, isolated from all other categories.
Practice
Quiz
In which context is the term 'sui' correctly used?