Here is a list of basic terminology used within Ju-Jitsu it is optional for students to use Japanese terminology.

Numbers

Ich = One

Roku = Six

Ni = Two

Sechi = Seven

San = Three

Hechi = Eight

Chi = Four

Kju = Nine

Go = Five

Ju = Ten

Tai = Body

Ashi = Leg

Hiza = Knee

Goshi / Koshi = Hip

Kote = Wrist

Hiji / Empi = Elbow

Te = Hand

Hara = Abdomen

Dojo = Training Hall

Sensei = Teacher

Kata = Pre-set of Techniques

Tori = Person applying technique

Uki = Person who the technique is applied to

Tatami = Mat

Rei = Bow

Yame = Stop / Halt

Hajime = Begin

Ma-ai = Distance Evaluation

Shikka = Knee Walking

Seiza = Kneeling Position

Kiai = Loud Shout / Scream

Ki = Spirit, inner energy

Karsu = Resuscitation

Gi = Training Suit

Hakama = Traditional Divided, Skirt

Waza = Techniques

Nage = Throws

Atemi = Strikes

Keri = Kicks

Uke = Blocks

Osaekomi = Hold downs

Kansetsu = Locks

Shime / Jime = Strangles

Kuzushi = Balance breaking

Sen-no-sen = Pre-emptive strike

Go-no-sen = Counter Strike

Sutemi = Sacrifice Throws

Kumite = Sparring

Tai-sabaki = Body Movement

Randori = Free practise

Ukimi = Break fall

Weapons

Bo = Long Staff (6ft)

Jo = Short Staff (4'6")

Tonfa =  Wooden Baton

Nunchaka = Rice Flail

Tanto = Knife

Tanjo = Stick (Short)

Kubaton = Steel Pin

Sai = Trident shaped knife

Kama = Small Sythe

Katana = Japanese Sword

Bokken = Practise Sword

Positions

Hidari = Left

Migi = Right

Chudan = Middle

Gedan = Lower