2 Words to use with hairpin

By the time I reached the car ahead the train had entered a wild gorge circle by one of those astonishing hairpin curves with which engineers defeat Nature.

Antwerp, with its population of four hundred thousand souls, its labyrinth of dim and winding streets lined by mediaeval houses, and its splendid modern boulevards, lies on the east bank of the Scheldt, about fifteen miles from Dutch territorial waters, at a hairpin-turn in the river.

2 Words to use with  hairpin