| Counting | |
| 1 | Ichi |
| 2 | Ni |
| 3 | San |
| 4 | Shi (Yon) |
| 5 | Go |
| 6 | Roku |
| 7 | Shishi (Nana) |
| 8 | Hachi |
| 9 | Ku (Kyu) |
| 10 | Ju |
| Clothing and equipment | |
| Dojo | Practice place |
| Kamiza | Shrine (picture of O’Sensei) |
| Tatami | Practice Mat |
| Gi | Uniform |
| Hakama | Black or dark blue pleated pants worn by Yudansha (Black Belts) |
| Obi | Belt |
| Shiro obi | White belt or a practitioner with a belt |
| Zori | Sandals worn in the dojo |
| Bokken | Wooden sword |
| Jo | Wooden stick |
| Tanto | Wooden knife |
| Manner | |
| Rei | Bowing; Literally “appreciation and respect” |
| Roles | |
| O’Sensei | Founder of Aikido |
| Sensei | The instructor |
| Yudansha | Blackbelt practitioners |
| Nage (Shite) | The person who does the technique. |
| Uke | The person who receives the technique. |
| Postured | |
| Ai hanmi | Partners face each other each with the right or the left foot forward (right/right or left/left) |
| Gyaku hanmi | Partners face each other one with the right foot forward the other other with the left foot or vice-versa (right/left or left/right) |
| Maai | Proper distance between the two partners facing each other: |
| Seiza | Kneeling position sitting on the heels with back straight. |
| Falls (Ukemi) | |
| Koho kaiten | Back roll |
| Ushiro Ukemi | Back roll |
| Zempo kaiten | Forward roll |
| Mae Ukemi | Forward roll |
| Warm up (Jumbe undo) | |
| Haishin undo | Final backstretch |
| Category of movements | |
| Tachi waza | Standing technique |
| Hanmi handachi waza | Technique done with uke standing and nage sitting |
| Suwari waza | Sitting technique |
| Taisabaki Body movements | |
| Omote waza | Entering movement in front of uke; considered positive |
| Ura waza | Entering movement behind uke; considered negative |
| Soto kaiten Mawari | Outside turning movement |
| Uchi kaiten Mawari | Inside turning movement |
| Irimi | Entering movement going towards uke |
| Tenkan | Turning movement pivoting |
| Renzoku Tenkan | Continuous pivoting |
| Tenshin | Nage steps back |
| Note: Most basic techniques can be omote, ura or both. | |
| Attacks | Kogeki |
| Kamae | Stance |
| Katate dori | One hand grasp of a wrist |
| Ryote dori | Two wrists grasp from the front (one hand per wrist) |
| Morote dori | Two hand grasp of a wrist |
| Kata dori | Shoulder grasp |
| Ryokata dori | Two shoulder grasp |
| Ushiro Kubishime | Choke from behind with free hand grabbing wrist |
| Ushiro tekubi dori | Two wrists grasp from behind |
| Ushiro ryokata dori | Two shoulders grasp from behind |
| Ushiro waza | Any attack from behind |
| Shomen uchi | Descending strike to the top of the head |
| Yokomen uchi | Sideways strike to the head |
| Tsuki | Thrust or punch |
| Jotori | Jo techniques |
| Tachitori | Attack with a boken |
| Tantotori | Attack with a knife |
| Waza | Techniques |
| Sumi Otoshi | Corner drop |
| Ikkyo | Arm pin |
| Nikkyo | Wrist control by turning it in |
| Sankyo | Wrist control by twisting it |
| Yonkyu | Wrist control by pressure on nerves |
| Irimi nage | Entering throw |
| Shiho nage | Four comer throw |
| Tenshi nage | Heaven (ten) and earth (shi) throw |
| Kote gaeshi | Throwing by turning out uke’s wrist |
| Kaiten nage | Throw by pushing uke’s arm across his back while pushing his down his head |
| Kokyu nage | Breathe throw (timing) |
| Kokyu ho | Breathing exercise |