A knot used to connect the ends of two large ropes or hawsers WordNet 3.0 & Open English WordNet

The Carrick bend, also known as the Sailor's breastplate, is a knot used for joining two lines. Wikipedia

A knot Wikipedia Disambiguation

Connective knot Wikidata

A strong bend knot commonly used to join two lines, ropes, and hawsers when required. A reliable safe knot if tied correctly, but unsafe if tied incorrectly, which is easily done. It is a basic knot which forms part of many other knots, hitches, bends, etc. Wiktionary