obturate
Very lowTechnical, Formal
Definition
Meaning
To block or close up, especially an opening or passage.
To obstruct or stop the flow of something, especially fluids or gases, by sealing an aperture. In firearms, it refers specifically to the sealing of the breech against the escape of gases.
Linguistics
Semantic Notes
The term is highly specific and almost exclusively used in medical, surgical, dental, or ballistics contexts. It implies a deliberate, mechanical action of sealing rather than a passive or natural blockage.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Used with equal rarity in both varieties.
Connotations
Technical precision. May sound esoteric or overly formal in non-specialist contexts.
Frequency
Extremely rare in general usage; confined to professional jargon in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject: person/machine] obturate [Direct Object: opening/cavity] (with [Instrument: material])The [Subject: material/device] obturates [Direct Object: opening]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Virtually never used.
Academic
Used in specific technical papers (e.g., dentistry, ballistics, surgery).
Everyday
Not used; would be replaced by 'block' or 'plug'.
Technical
Primary context. E.g., 'The dentist will obturate the root canal with gutta-percha.' or 'The cartridge case must obturate the chamber to prevent gas escape.'
Examples
By Part of Speech
verb
British English
- The surgeon needed to obturate the perforation to prevent infection.
- This compound is used to obturate the tiny fissures in the material.
American English
- The dentist will obturate the canal after cleaning it thoroughly.
- The new valve design obturates more reliably under high pressure.
adverb
British English
- Not applicable; no standard adverb form.
American English
- Not applicable; no standard adverb form.
adjective
British English
- The obturating material proved ineffective over time. (gerundive/participial use)
American English
- An obturating ring is a key component of the artillery shell. (attributive use of participle)
Examples
By CEFR Level
- The plumber had to obturate the old pipe before installing the new one.
- A special clay was used to obturate the leak in the experimental apparatus.
- In endodontic therapy, it is critical to completely obturate the root canal system to ensure a successful outcome.
- The ammunition was designed to obturate perfectly within the rifle's chamber, maximising muzzle velocity.
Learning
Memory Aids
Mnemonic
Think of an **OBTURATE**d tube: It's **OBstructed** and impene**TRAble**, completely sealed shut.
Conceptual Metaphor
SEALING IS SILENCING/STOPPING (e.g., obturating a passage stops the flow of information or substance).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'obturator' (запиратель, обтуратор), which is a related noun for a device that obturates.
- Avoid using the direct calque 'обтурировать' as it is very rare in Russian; 'закупоривать', 'закрывать', 'запечатывать' are more common equivalents.
Common Mistakes
- Mispronouncing it as /ɒbˈtʃʊə.reɪt/ or /əbˈtjʊə.reɪt/.
- Using it in everyday contexts where 'block' or 'plug' is appropriate, making speech sound stilted.
- Confusing it with 'obfuscate' (to confuse/make obscure).
Practice
Quiz
In which of the following contexts is the verb 'obturate' most appropriately used?
FAQ
Frequently Asked Questions
No, it is a very rare, technical term used almost exclusively in fields like medicine, dentistry, and ballistics.
The related nouns are 'obturation' (the process of blocking) and 'obturator' (a device or prosthesis that blocks an opening).
It is not recommended. Using 'obturate' in casual conversation would sound unnatural and overly technical. Use 'block', 'plug', or 'clog' instead.
They are close synonyms. 'Occlude' is more common in medical contexts (e.g., occluded artery) and can imply a natural or pathological closure. 'Obturate' often implies a deliberate, mechanical act of sealing a specific opening or passage.