Terminology
Karate 空手
Empty Hand (or "Chinese hand", though the word kara is a homonym of two completely different
kanji characters - one meaning "empty" and the other meaning "Chinese.")
Dojo 道場
Training hall (literally Place of the way)
Shihan 師範
Master Teacher (Rarely used title)
Sensei 先生
Teacher
Sempai 先輩
Senior
Kohai 後輩
Junior
Gi 衣 or 着
Uniform (Karate Suit)
Kyu 級
Levels below Black belt, counting down to 1st kyu, usually from 8th kyu
Dan 段
Steps showing mastery of the art, starting from 1st dan
Rei 礼
Courtesy/Bow
Osu 押忍
Acknowledgment (Used as a salutation between martial art practitioners.)
Yoi 用意
Ready Position
Hajime 始め
Begin
Yame 止め
Finish/Complete your movement
Mawatte 回って
Turn
Narande 並んで
Line up
Kihon waza 基本
Basics
Kata 型or形
Form
Kumite 組手
Sparring
Zanshin 残心
Awareness