A kayak is a small, narrow watercraft which is propelled by means of a double-bladed paddle. the word kayak originates from the greenlandic language, where it is the. One does not sit in a kayak; one wears a kayak. it’s difficult to brace, make sweep turns, and/or to roll a kayak if your hips, knees, feet, and butt are not in solid. Kayaking is the use of a kayak for moving across water. it is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle..