dual

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

adjective consisting of or involving two parts or components usually in pairs
adjective having more than one decidedly dissimilar aspects or qualities; ; - R.W.Emerson; -Frederick Harrison
adjective a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural)

PIE word *dwóh₁ Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.

White Fang experienced dual feelings. — White Fang, Jack London
She is a dual creature. — Victorian Short Stories: Stories of Courtship, Unknown
That’s the only English dual number. — A Portrait of the Artist as a Young Man, James Joyce

double, duple

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