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TOEIC Link Part 5: dual versus duel

Dual means having two parts or serving two functions; duel is a formal fight between two people (or, as a verb, to compete fiercely). The two are pronounced alike but never overlap in meaning, so Part 5 uses the pair to check whether you read for sense rather than for sound.

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TOEIC Link Part 5: dual versus duel

Dual and duel sound the same, yet they describe unrelated ideas. Dual is an adjective meaning double, twofold, or serving two purposes; duel is a noun (and verb) meaning a contest or fight between two sides. Because the two are homophones, Part 5 can slot the wrong spelling into a blank and reward a reader who processes only the sound. For another pair separated by sound alone, see complement versus compliment.

The core rule: double versus fight

  • dual (adjective) = having two parts, aspects, or functions. The device has a dual power supply. / She holds dual citizenship.
  • duel (noun / verb) = a contest or fierce competition between two parties. The two firms are locked in a pricing duel. / The finalists dueled for first place.

The clue is the word's grammatical job. Dual is almost always an adjective modifying a noun — it tells you something comes in twos. Duel is a noun or verb naming a two-sided struggle. One describes a structure; the other names a fight.

Why Part 5 likes this pair

The two words fill different grammatical slots, so the sentence structure usually decides the answer.

The car's __ airbags protect both front-seat passengers.

The blank modifies airbags and means two, so the adjective dual fits. A fight cannot modify airbags.

The election became a bitter __ between the two frontrunners.

Here the blank is a noun naming a two-sided contest, so duel is required.

Spotting the clue in the structure

Ask whether the word is describing a noun or naming a contest:

  • It is an adjective meaning double or twofold before a noun → choose dual (dual controls, a dual role, dual purpose).
  • It is a noun or verb naming a fight or fierce competition between two sides → choose duel (a legal duel, they dueled for the title).

A quick test settles most items: if you could swap in double or two-part, you want dual; if you could swap in contest or fight, you want duel. For another pair where the word's role in the sentence decides the answer, see eminent versus imminent.

Quick self-check

  1. The laptop offers __ storage: an SSD and a hard drive. (dual — twofold)
  2. The two rivals fought a marketing __ for the holiday season. (duel — two-sided contest)

Takeaway

If the blank is an adjective meaning double or twofold, you need dual. If it names a contest or fight between two sides, you need duel. Decide whether the sentence describes a two-part structure or a two-sided struggle, and two identical-sounding words stop competing. For a related pair decided by meaning rather than spelling, see principal versus principle.