achilles
LowLiterary, formal, figurative
Definition
Meaning
A hero from Greek mythology, the greatest warrior of the Trojan War, famous for being invulnerable except for his heel.
Refers to a seemingly strong or invincible person, system, or thing that has a single, critical point of weakness or vulnerability. Often used attributively to describe such a weakness.
Linguistics
Semantic Notes
Primarily used in the collocation 'Achilles heel' to denote a fatal weakness. The name itself is a proper noun and is capitalised. Its use is almost entirely metaphorical in modern English.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Both use 'Achilles heel' as the primary collocation. UK spelling may favour '-ise' suffixes in related verbs (e.g., 'epitomise'), but this is not specific to the word itself.
Connotations
Identical.
Frequency
Usage is equally literary and low-frequency in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
Possessive + Achilles heel (e.g., 'The country's Achilles heel is...')Appositive use (e.g., 'Achilles, the Greek hero')Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Achilles heel”
- “The heel of Achilles”
Usage
Context Usage
Business
Used to refer to a critical weakness in a company's strategy, product, or market position.
Academic
Used in literary criticism, classics, and psychology (e.g., discussing a character's fatal flaw).
Everyday
Rare in casual conversation. Used in more educated, figurative speech to describe a personal or systemic weakness.
Technical
In anatomy/medicine, refers specifically to the 'Achilles tendon' (tendo calcaneus).
Examples
By Part of Speech
adjective
British English
- The team's achilles weakness was finally exploited in the final.
American English
- He suffered an achilles-type injury that ended his season.
Examples
By CEFR Level
- Achilles was a famous hero in old Greek stories.
- His lack of patience is his Achilles heel at work.
- The company's over-reliance on a single supplier proved to be its Achilles heel during the crisis.
Learning
Memory Aids
Mnemonic
Imagine a strong, 'chilly' warrior named Achilles. His strength is chilling, but his 'heel' makes him vulnerable, so it's his 'Achilles HEEL'. Remember: 'A chill in his heel' felled him.
Conceptual Metaphor
STRENGTH IS INVULNERABILITY; A WEAKNESS IS A PHYSICAL DEFECT (a vulnerable body part).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'Achilles heel' literally as 'пятка Ахилла'. The established Russian idiom is 'ахиллесова пята'.
- The possessive form in English ('Achilles heel') does not require an apostrophe, unlike the Russian adjectival form ('ахиллесова').
Common Mistakes
- Misspelling: 'Achilles' heel' (with an apostrophe) is common but considered less standard for the modern compound noun than 'Achilles heel'.
- Mispronunciation: Stressing the first syllable (/ˈækɪliːz/) is incorrect. The stress is on the second syllable: /əˈkɪliːz/.
Practice
Quiz
In which field is 'Achilles' used in a strictly literal, non-metaphorical sense?
FAQ
Frequently Asked Questions
Both are used, but modern dictionaries and style guides increasingly list 'Achilles heel' (without the apostrophe) as the standard compound noun, similar to 'goods yard'.
Very rarely. It is almost always part of the fixed phrase 'Achilles heel'. Using it alone (e.g., 'That is the project's Achilles') would be unnatural and unclear.
It functions as a possessive proper noun acting attributively (like a possessive adjective) to modify 'heel'. The entire phrase is a compound noun.
Yes, it is part of common cultural literacy. Most educated speakers understand the reference to a 'fatal weakness', even if they don't know the full mythological details.