rapidity
C1Neutral to Formal. Common in academic, scientific, and professional contexts; less common in casual conversation.
Definition
Meaning
the quality of moving or happening with great speed; swiftness.
The property of proceeding or being completed in a short amount of time; can also refer to the fast pace of change, action, or thought.
Linguistics
Semantic Notes
Often implies a surprising or noteworthy degree of speed. More formal and less emotive than 'speed' or 'quickness'; often used to describe processes, changes, or movements in an objective, analytical way.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling is consistent. Slight preference in US English for 'speed' or 'quickness' in informal contexts.
Connotations
Neutral/scientific in both. May connote efficiency or, in some contexts, disconcerting haste.
Frequency
Used with similar frequency in both dialects; slightly more prevalent in academic/technical writing.
Vocabulary
Collocations
Grammar
Valency Patterns
the rapidity of [NOUN PHRASE] (e.g., the rapidity of his ascent)with [ADJ] rapidity[VERB] with rapidityVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “at breakneck rapidity”
- “with lightning rapidity”
Usage
Context Usage
Business
'The rapidity of the market shift caught many investors off guard.'
Academic
'The study measured the rapidity of synaptic transmission.'
Everyday
'I was surprised by the rapidity of the delivery.'
Technical
'Engineers praised the rapidity of the processor's clock cycle.'
Examples
By Part of Speech
verb
British English
- The cheetah can accelerate with astonishing rapidity.
- Events proceeded with unwelcome rapidity.
American English
- The startup scaled with incredible rapidity.
- The fire spread with alarming rapidity.
adverb
British English
- Not applicable for 'rapidity'. The adverb is 'rapidly'.
American English
- Not applicable for 'rapidity'. The adverb is 'rapidly'.
adjective
British English
- Not applicable for 'rapidity'. The adjective is 'rapid'.
American English
- Not applicable for 'rapidity'. The adjective is 'rapid'.
Examples
By CEFR Level
- The rapidity of the rabbit surprised the children.
- He finished his work with rapidity.
- We were amazed by the rapidity of her recovery from illness.
- The rapidity of technological change is a modern challenge.
- The rapidity with which the political situation deteriorated was unsettling.
- Modern processors handle data with breathtaking rapidity.
- The rapidity of the glacier's retreat serves as a potent indicator of climate change.
- His promotion was due not just to skill but to the rapidity of his decision-making in crises.
Learning
Memory Aids
Mnemonic
Think of a RAPId ITem being delivered with Y (why?) so fast? Because of its RAPIDITY.
Conceptual Metaphor
TIME IS MOTION / SPEED IS A FORCE (The rapidity of events swept them along.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Не переводить как 'рапидность' (несуществующее слово).
- Основной перевод: 'быстрота', 'скорость'.
- Отличать от 'rapidness' (более редкий синоним) – 'rapidity' стандартнее.
Common Mistakes
- Incorrect: 'He ran with a high rapidity.' Correct: 'He ran with great rapidity.'
- Confusing 'rapidity' (noun) with 'rapidly' (adverb).
Practice
Quiz
In which sentence is 'rapidity' used MOST appropriately?
FAQ
Frequently Asked Questions
They are close synonyms, but 'rapidity' is more formal and often implies a noteworthy or measurable quality of speed in a process or change.
Yes, but it's more common in writing or formal speech. In casual talk, 'speed' or 'quickness' are often more natural.
The adjective form is 'rapid' (e.g., rapid change). The adverb is 'rapidly' (e.g., change rapidly).
Both are nouns from 'rapid'. 'Rapidity' is far more common and standard in modern English. 'Rapidness' is rarely used.