Crabs and their close relatives have 10 legs, arranged in five pairs. Some of their legs are used for walking, while others are used for swimming or defense.
Definition of plunge for English Language Learners. : 1  a sudden fall or jump usually from a high place. : 2  a sudden quick fall in amount, value, etc. : 3  the act of suddenly beginning to be in a particular condition or situation.
How to Swim Freestyle. Freestyle was traditionally a race that allowed competitors to swim in whichever way they wanted. However, after what was referred to as the front crawl became the dominant way to freestyle, the term freestyle has replaced the term front crawl as the name for the stroke. Freestyle involves alternating arms that make windmill arc motions forward while the head is underwater, and the swimmer breathes at the side.