Taekwondo is a modern martial art, characterized by it's fast, high and spinning kicks.
There are multiple interpretations of the name taekwondo. Taekwondo is often translated as 'the way of hand and foot'.

Tae ='to strike or block with the foot' or 'to kick'.
K'won ='Fist', 'to strike or block with hand'
Do ='The way of' or 'art'.

Put this together and Taekwondo means:
"The art of Kicking and Punching" or
"The art of unarmed combat".

The sport has been founded in Korea and is one of the popular modern martial arts.