Page 169 - Peter Randall "The Craft of the Knot.."

ROPE
Cordage that is too large in cross section to be referred to as twine. It is
generally made up of more than one strand or component.

ROUND TURN
When a rope is wrapped around an object such that it passes behind it
twice.

RUNNING END

Also called the end, the working end, and the tag end; refers to the tip of
the rope when used in forming a knot.

SEIZING
A form of lashing, used to secure one rope to another, often the running
end back to the standing part, after the knot is formed.

SENNIT
Braided cordage, also called sinnet.

SHEATH
The part of a rope that forms its outer covering, when it has a “sheath
and core” structure.

SHOCK LOADING

Placing temporary tension on a slack rope as it comes under sudden
strain.

SLACK
When there is room to pull on a rope or knot, without tightening it.

SLING
A ready-made form of rope, usually a closed loop, that can readily be
applied to something to serve as a hitch.

SLIP KNOT
A knot where the last tuck is made with the running end folded over into
a bight, such that it can be released by just pulling on the running end.