byht

Old English byht meant "a bend" or "a curve"—from bugan, "to bow" or "to bend." Sailors used it for the loop formed when a rope is coiled: the bight of a line is the curved middle section between the two ends. Knot-tying still uses this sense. A bight is not a knot; it is the raw material from which knots are made.

By the 16th century, English sailors had transferred the word to geography. A bight was a wide, shallow bay—a gentle curve in the coastline, broader than a cove but shallower than a gulf. The distinction is imprecise. A bight is defined more by its openness than by strict dimensions. It is the coastline bending, not enclosing.

The Bight of Benin and the Bight of Biafra, along the West African coast, became infamous during the transatlantic slave trade. Between the 16th and 19th centuries, millions of enslaved people were shipped from the ports along these bights. The geographical term, neutral in itself, carries the weight of that history. "Beware, beware the Bight of Benin" was a sailors' rhyme warning of disease—malaria killed Europeans at staggering rates along this coast.

The Great Australian Bight, the long curve of Australia's southern coast stretching over 1,100 kilometers, was named by Matthew Flinders during his circumnavigation of Australia in 1802. The Bight has no natural harbors, and the Nullarbor Plain behind it has almost no fresh water. It is one of the least inhabited coastlines on earth—a bend with nothing behind it.