Definition
A square knot is a knot used to join two ropes of similar diameter. Imagine tying a basic knot where you go right over left, then left over right. It's also known as a reef knot, traditionally used for reefing sails. However, it's crucial to note that while useful, it's not as secure as other knots for critical applications. Never use it where lives or safety depend on a secure knot. Think of it as a handy knot for light tasks but not for heavy-duty situations.