Bold terms should be known as karateka.

Japanese Statement Meaning
Dojo (Dōjō) doo-djoo Classroom, place where martial arts are practiced
Honbu dōjō hom-bu doo-djoo Main dojo
Budo (Budō) bu-doo “The way of the samurai” of “the way of the warrior”. It is a collective name for all Japanese martial arts. Karate is also a budo sport or perhaps better: -art.
Osu! Us! Greeting, but only within budo world. In the "ordinary’ Japanese it will be not used as such and it actually has no real meaning. However, within the budo world it has taken on the meaning of a kind of greeting. It is also often used in the sense of “and”, of “understood” (although the correct Japanese words for this are actually 'Hai’ in ‘Wakarimasu’). However, there are quite a few different views on this and there is also disagreement about the origin of the term…
Hai hai And
Sensei sensei Teacher
Senpai sempai Multiple, older
Shihan shi-han Grandmaster (from godan or the 5th Dan)
Seiza seh-za Traditional Japanese sitting position on the knees.
Mokuso moxa Meditation (literally: "Empty mind").
Mokuso yame mokso jameh Stop meditation
Yame jameh Stop
King deer Greeting (order to greet each other)
Sensei ni rei sensei not reh Greetings to the teacher (the command to greet the teacher, ordered by a sempai who opens the lesson)
Otagai ni rei otagai not reh Greetings to each other (fellow students)
Kiritsu kie-rie-tsu Rise
Yoi Thursday Ready, ready
Hajime ha-ji-meh Begin, start
Naotte on-from-those Ready, the end of (this one) practice! (and so goodbye)
I am still looking for the origin of this word. Presumably it comes from the verb ‘Naoru’ which translates as "(herself) produce'. So ‘Naotte’ can be translated as “fix yourself” (of the exercise) of “back to original position”…
Yasume ja-su-meh Rest on the spot (after greeting!)
Obi o-bie Band
Give, Dōgi gie, doo-gie Karatepak (speak the g out as in English "go")
Kyuu (kyū) kjoe Level, grade (for lower tires, t/m bruin). pay attention: Kyuu can also be the number 9 mean!
And and Grade (higher tires, from black)
Kamae ka-mai Attitude (usually this refers to the combat position, before start of kumite of hand)
Kihon ki-hon Basis, style technical basic training
Kihon kumite ki-hon Style technical basic training with partner (opposite to each other)
Kumite ku-mie-teh Literally "meeting hands", loosely translated it stands for "combat exercise". Kumite is often used as an abbreviation forJiyu kumite, with which then the free fight (sparring) is meant.
Jiyu Kumite djie-ju ku-mie-teh Free fight. So the "sparring’ with each other. Often times Jiyu omitted and they simply say Kumite.
Hand hand Training fight, where only light is tapped (usually only the shoulders). I have not yet figured out the literal meaning or origin of the word 'hand’. I'm also not sure about the correct spelling. As soon as I know, it appears here…
Word the word Individual style exercise with a series of defined movements, carried out against 4 until 8 imaginary opponents, attacking from different directions. Also see Word.
Shihoo (Shihō) shie-hoo Shi= four, Hoo= direction, so "four directions". In karate, one Shihoo An exercise, performed in four directions.
Mawatte ma-wat-teh Comes from the verb ‘Mawaru’ and means to turn or revolve. Used at many karate schools as a command to turn students 180 ° and continue in the other direction. Actually incorrect use of this word, because in Japanese it means a rotation of 360° or multiple turns (such as mill blades or paddle wheel)!!! Would be more correct:‘Ushiro’.
Ushiro! oe-shie-roh! (Commando) Turn around. Literally: “behind”. Presumably this originated as some sort of abbreviation for ‘Ushiro o muite’ which means something like “turn to the back” of “look back” (the latter is of course very important in karate before turning!). In some schools this term is used to describe a particular exercise (kihon) backwards, so without turning around… (also see “Ushiro ….”)
Ushiro …… oe-shie-roh …… (In conjunction with another term:) Backwards. E.g.: ushiro geri = backward kick, ushiro empi uchi = backward elbow strike. (also see “Ushiro!”)
Hantai han-tai Other side, other side. Swap. Used in on-site exercises (sonoba) to change leg or hand.
Goorei (gōrei) goo-king Order, commando. Counting 1 until 10 is also seen as a command, So gōrei.
Ki-ai ki-ai Literally: “Spiritual encounter”, the scream at the moment of a thrust, stair or defense, where all energy (ki) in your body is focused, bundled in place of that punch, stair or defense.
Kent ken-ta-teh Push-up (=tate) on the knuckles (=ken). Gewone push-up is udetate. Special variant: on the fingers: loved.
Sonoba so-no-ba On the spot (e.g. sonoba tsuki = bumping into place)
Zanshin zan-sjin Awareness (‘awareness’) during attack or defense.
The body
Japanese Statement Meaning
Fuck djoo-and High part (from the body, think of: head, neck and shoulders)
Chudan sjoe-dan Middle part (from the body, think of: chest, belly, rug)
Gedan Gee-and Low part (from the body, think of: lower abdomen, legs, etc.)
Empi em-pie Elbow
Shuto sjoe-to Handsnee pink edge
Nukite noe-kie-tea Spearhand
Nihon-nukite no-hon noe-kie-teh Two-fingered spear hand