A Glossary of Knot-Tying Terms

Knot instructions lean on a specific vocabulary that isn't always obvious the first time you meet it. Knowing these terms makes every knot page, on this site or anywhere else, considerably easier to follow.

The parts of a rope in use

The standing part is the main length of rope not actively being worked — the part under load, or simply the bulk of the rope not involved in the knot's active tucks and wraps. The working end (also called the tail or the running end) is the end being actively manipulated to form the knot. A bight is a curved section of rope formed by folding it back on itself without crossing it — many knots, like the bowline on a bight, are tied entirely using a bight rather than a free working end, which matters whenever both rope ends are already committed elsewhere.

The knot-family vocabulary

A hitch attaches a rope to an object — a post, ring, another rope, a carabiner — and generally depends at least partly on the object itself for its security; a clove hitch tied around nothing at all simply falls apart. A bend joins two separate rope ends together, like a sheet bend or a carrick bend. A loop (or knot, in the narrower sense some traditions use the word) forms a fixed or adjustable circle in a single rope, like a bowline or a figure-eight loop. A binding knot, like a constrictor knot or a lashing, wraps around and compresses an object or bundle rather than attaching a load-bearing line to it.

Dressing and setting

Dressing a knot means arranging all its parts so they lie parallel, untwisted, and snug against each other, with no crossed or loose sections, before it's loaded. Setting a knot means applying load (often just a firm hand pull) to snug it fully into its final shape. A knot that's dressed but not set can look correct while still being noticeably weaker or less secure than the same knot properly set — both steps matter, and skipping either is a common, often invisible mistake.

How knots fail: capsizing, slipping, and jamming

Capsizing describes a knot's internal structure distorting into a different, usually weaker or less secure shape under load — a poorly dressed bowline capsizing into a shape that no longer holds reliably is the textbook example, and it's precisely why climbers favor the figure-eight loop, which resists capsizing under shock load rather than distorting the way a bowline can. Slipping describes the rope simply sliding through the knot under load without the knot's structure itself distorting — a granny knot slipping apart is a slipping failure, distinct from capsizing. Jamming describes the opposite problem: a knot that's been loaded so hard it locks up and becomes extremely difficult or impossible to untie by hand — the double fisherman's knot and the constrictor knot are both knots that jam by design, which is a feature for a permanent join and a real inconvenience for anything meant to be temporary.

Whipping, seizing, and finishing a rope's end

Whipping is wrapping a rope's cut end tightly with thin twine or thread to stop the strands from fraying and unraveling — sailmaker's whipping and common whipping are two traditional methods differing mainly in how securely the wrapping itself is locked off. Seizing is binding two parallel ropes, or two parts of the same rope, together side by side, distinct from whipping a single rope's end.

Load-rating vocabulary worth knowing

Retained strength (or strength efficiency) describes what percentage of a rope's own rated breaking strength a given knot typically preserves — every knot reduces this figure to some degree, for reasons covered in this site's guide to knot strength. A shock load is a load applied suddenly rather than gradually, like a fall being caught by a rope, and it stresses both rope and knot considerably more than the same weight applied as a steady, gradual pull. Working load (or safe working load) is the load a rope or system is rated to carry routinely with an appropriate safety margin below its actual breaking strength — never the same number as the breaking strength itself.

A few terms specific to friction hitches and rigging

A friction hitch, like a prusik knot or klemheist knot, grips a loaded rope by friction rather than by a fixed mechanical connection, letting it be repositioned along the rope by hand when unloaded. Mechanical advantage describes a rigged system, like a truckers hitch, that multiplies the force a person can apply by hand through pulleys or hitches — a 3:1 mechanical advantage means roughly three units of pull on the hauling end for every one unit of resulting tension on the load, before accounting for friction losses in the system.

Why this vocabulary is worth learning

None of these terms are obscure for their own sake — each one describes a real, specific behavior that changes how you should think about a knot's security, and knowing the precise word for "the knot distorted into a weaker shape" versus "the rope slid through the knot" versus "the knot locked up and won't come undone" makes it considerably easier to diagnose what actually went wrong the one time a knot doesn't behave the way you expected.

A few terms specific to families this site organizes knots by

A friction hitch is one specific kind of hitch, distinct from a hitch that attaches to a fixed object — it grips a second, separately loaded rope instead, which is the mechanism behind ascending or backing up a rope with a prusik knot or klemheist knot. A stopper knot is a small knot tied purely to prevent a rope's end from pulling through a block, pulley, or another knot's loop — the overhand knot and figure-eight knot are the two most common examples, chosen for how bulky and how easy-to-untie-afterward each one is. A lashing binds poles or spars together at a fixed angle using turns and frapping wraps, a distinct technique from tying a single hitch or bend, and it's the term behind this site's whole activity category for tripods, frames, and camp structures.

How this glossary connects to the rest of the site

Every knot page on this site uses this same vocabulary consistently — a strength note will mention retained strength and cautions about capsizing or slipping in roughly the terms defined here, and a comparison page arguing two knots against each other will lean on the same hitch/bend/loop/binding-knot categories. Keeping this page open in a second tab the first few times you read through an unfamiliar knot's page is a reasonable way to get comfortable with the vocabulary quickly, rather than trying to absorb it all at once from a single glossary read.