'Dual' means having two parts or functions; 'duel' is a formal combat between two people.
Adjective. Having two components, functions, or natures. Double.
She holds dual citizenship in Spain and the United Kingdom.
The dual-screen laptop is popular among video editors.
The product serves a dual purpose: it moisturises and protects from UV rays.
Noun/verb. A formal fight between two people, especially with swords or pistols. Also to compete directly.
Alexander Hamilton died after a duel with Aaron Burr in 1804.
The two companies have been in a pricing duel for months.
The chess match felt like a mental duel between two grandmasters.
Common mistake
Mixing them up: "The product has a duel function" (correct: dual). Or "They settled it through a dual" (correct: duel).
Trick to remember it
'Dual' has the vowel A for 'and' — two things: A AND another. 'Duel' has E for 'enemy' — a duel is between two enemies.
Quick rule
Does it mean double or two parts? 'Dual'. Is it a formal fight between two people? 'Duel'.
Did you know?
Duelling was banned in most European countries by the 18th century, yet it continued informally well into the 20th. The last legally-recognised European duel was fought in France in 1967. Hamilton-Burr (1804) remains the most famous US duel — and it ended the political career of both men, one fatally.
Exercise 1 · Pick the right one
The senators agreed to settle the political rivalry with a public debate — a verbal _____ of sorts.
Exercise 2 · Pick the right one
The new phone offers _____ SIM card slots, making it ideal for frequent travellers.
Exercise 3 · Form the word
Does it mean double or two parts? 'Dual'. Is it a formal fight between two people? 'Duel'.
Mixing them up: "The product has a duel function" (correct: dual). Or "They settled it through a dual" (correct: duel).
'Dual' has the vowel A for 'and' — two things: A AND another. 'Duel' has E for 'enemy' — a duel is between two enemies.
Bryan López
Founder of SpeakUP Academy