curve or arc in a rope between the working end and the standing part.

Merriam-Webster Online Dictionary
bight (noun)
a bend in a coast forming an open bay , also a bay formed by such a bend
a slack part or loop in a rope
bight (Wikipedia)

bight may refer to:

  • Bight (geography), recess of a coast, bay, or other curved feature
  • Bight (knot), a curved section, slack part, or loop in rope (used in the terminology of knot-tying)
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