mainstay
C1Formal / Neutral. Common in journalism, business writing, and formal analysis.
Definition
Meaning
The chief support or most important part of something; a person or thing on which something else is largely based.
A strong, steadying rope (stay) supporting the mainmast of a sailing ship; by extension, the principal source of stability, support, or reliability in any system or organization.
Linguistics
Semantic Notes
Implies reliability, continuity, and foundational importance. Often used to describe something or someone that has provided support for a long time.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. The word is equally common in both varieties.
Connotations
Slightly formal or literary, but not archaic. Conveys a sense of reliability and tradition.
Frequency
Comparable frequency in both British and American English.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] is a/the mainstay of [Object][Object] is a mainstay for/of [Subject]serve as a mainstayVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “(no common idioms use 'mainstay' directly)”
- “to be the mainstay (of something)”
Usage
Context Usage
Business
‘Tourism has become the mainstay of the local economy, providing thousands of jobs.’
Academic
‘Quantitative methods remain a mainstay of sociological research, despite the rise of qualitative approaches.’
Everyday
‘My grandmother was the mainstay of our family, always there with advice and support.’
Technical
‘In surgery, antibiotics are a mainstay for preventing post-operative infections.’
Examples
By Part of Speech
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- N/A - Word is above A2 level.
- Farming is the mainstay of life in this region.
- She is the mainstay of our football team.
- For decades, the factory was the economic mainstay of the entire town.
- Antibiotics are a mainstay in the treatment of bacterial infections.
- The principle of informed consent has become a mainstay of modern medical ethics.
- His rigorous analysis of historical data remains a mainstay of the academic debate.
Learning
Memory Aids
Mnemonic
Think of a large SAILING ship (the 'main' mast) held steady by a strong rope (the 'stay'). The ship relies on it completely. A 'mainstay' is the thing a system relies on completely.
Conceptual Metaphor
SUPPORT IS A PHYSICAL PROP; IMPORTANT THINGS ARE CENTRAL/STEADYING STRUCTURES.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating directly as "главная поддержка". It is too literal. Use "стержень", "основа", "основная опора", "краеугольный камень".
- Do not confuse with "главное развлечение". Mainstay implies support and reliability, not just popularity.
Common Mistakes
- Using it to mean 'most popular trend' (Incorrect: 'Smartphones are the mainstay of modern fashion.' Correct: '...mainstay of modern communication.').
- Using it for temporary or new support (Incorrect: 'The new policy is the mainstay of our strategy.' Use 'cornerstone' or 'key element' for new things; 'mainstay' implies established support).
Practice
Quiz
Which of the following best describes the meaning of 'mainstay'?
FAQ
Frequently Asked Questions
It is exclusively a noun in modern English.
Yes, it commonly refers to a person who is a vital, reliable source of support for a group or organisation.
It comes from nautical terminology (mid-16th century): 'main' (principal) + 'stay' (a strong rope supporting a mast). It was used figuratively by the 18th century.
It is neutral to formal. It is common in analytical, journalistic, and academic writing but would sound slightly formal in very casual conversation.