dual
UK: ˈdjuːəl | US: ˈduːəl
adj. consisting of two parts or elements
adj. having a double character or nature
n. (Grammar) a dual form of a word
The word "dual" originates from Latin dualis, which combines duo (two) and the suffix -alis (relating to). It entered English via Old French in the late Middle Ages, retaining its core meaning of "pertaining to two." The logical progression reflects its use in mathematics, grammar, and philosophy to denote duality or paired states.
The device has a dual function as both a scanner and a printer.
She holds dual citizenship in Canada and France.
In Old English, some nouns had dual forms to indicate two items.
The project requires a dual approach to solve both technical and ethical issues.
His dual role as teacher and mentor made him highly respected.