"Ardha" means "half" in Sanskrit. Since the full posture is difficult to be practiced, the half-posture, which is easier, is followed widely. This posture was first promoted by the great Yogi Matsyendranath, one of the founders of Hatha Yoga, and hence the name.
"Bhujanga" means "cobra" in Sanskrit. This asana is called "Bhujangasana" as the raised trunk, neck and head while practicing it resemble a cobra rearing its hood and about to strike, while the joined and stretched legs resemble its tail.
"Danda" means "stick" in Sanskrit.
"Dhanus" means "bow" in Sanskrit. In the final position of this asana, the body takes the shape of a bow, drawn tight to shoot an arrow. The stretched arms and lower legs resemble the taut bowstring, while the trunk and thighs resemble the wooden part of the bow.
"Go" means "cow" and "Mukha" means "face" in Sanskrit. When this asana is performed, the final position of the legs resembles the face of a cow.
"Hala" means "Plough" in Sanskrit. This posture is called 'Halasana' because in the final position the body resembles the Indian plough.
"Janu" means "knee" and "Siras" means "head" in Sanskrit. The head is made to rest on the knee in this posture, hence the name.
"Matsya" means "fish" in Sanskrit. If a person lies steadily on water in this posture, he can keep floating on it easily like a fish without the help of the hands and legs, as the name of the asana suggests.
"Paschima" means 'behind', 'back' or 'posterior' and 'Uttana' means to stretch out in Sanskrit. "Paschimotana" means stretching the posterior regions of the body.
"Shalabha" means "locust" in Sanskrit. The final position of this asana resembles a locust when it lowers its head to eat and raises its tail. Hence, the name.
"Supta" means "asleep" in Sanskrit. "Supta Vajrasana" is lying down supine in Vajrasana.
"Tri" means "three", "Kona" means "angle", and "Trikona" means "triangle" in Sanskrit The straight legs with the floor between the feet resemble the three sides of a triangle in this asana. Hence the name.
"Ushtra" means "camel" in Sanskrit.
"Ut" means 'raised' and "kata' means "hips" in Sanskrit. This posture is known as "Utkatasana" because while practicing it, the heels and hips are raised.
"Veera" in Sanskrit means "brave". The way a brave man takes his position while attacking his enemy, the similar position is formed in this asana. Hence it is called as "Veerasana", the pose of a Warrior.
"Vriksha" means "tree" in Sanskrit. In the final position of this asana, you have to stand still like a tree.