Tae - To kick (flying kicks)
Kwon - To punch (strike with hands)
Do - The Art or the Way.
Tae Kwon Do means: The Art of Kicking and Punching.
Belt System:
White - Purity
Yellow - Sead planted in the earth
Green - Growth (knowledge)
Blue - Heaven (sky is the limit)
Red - Blood (the essence of life) caution
Black - Unity (all colors combined  brings understanding)