twin
UK: twɪn | US: twɪn
n. one of two children or animals born at the same birth
adj. being one of two identical or closely related things
vt. to pair or link closely
The word "twin" originates from Old English twinn, meaning "double" or "twofold." It is derived from the Proto-Germanic twīhnaz, which emphasizes the concept of duality. The morpheme tw- reflects the numeral "two," while -in signifies a connection or pairing. Over time, "twin" evolved to describe not only siblings born together but also any paired or closely matched entities.
She gave birth to twin boys last week.
The two buildings are twin structures, designed by the same architect.
The scientist studied twin stars in the distant galaxy.
They decided to twin their city with a town in France for cultural exchange.
Her dress had twin pockets on either side.