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Today it means

dual

consisting of two parts

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Where does the word "dual" come from? It comes from Latin dualis, and was adopted directly into English (1600s).

Read the full story

Where does the word "dual" come from? It comes from Latin dualis, and was adopted directly into English (1600s).

Dual’s story begins in Latin: dualis meant “containing two.” From 'duo', two. It reached English by 1600s as dual. 'dual carriageway' dates from the 1930s. Today, dual means consisting of two parts.

  1. Stage 1 · Latin · ancient dualis "containing two", from 'duo', two.
  2. Stage 2 · English · 1600s dual "twofold", 'dual carriageway' dates from the 1930s.

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