Being, existing, sitting.

Power, force.

居 (i[1]) "being, existing, sitting" + 合 (ai[1]) "ai". The principle of responding fastly and accordingly to the present state.

居合 (iai) "iai" + 道 (dō[1]) "way, path, dō". A modern, uncompetitive sword art developed from iaijutsu and which depends on iai principle.

居合 (iai) "iai" + 術 (jutsu) "technique, art". A kobudō which depends on the iai principle. Some of today's active iaijutsu school's date back from 15th or 16th century.

居合 (iai) "iai" + 刀 (tō[1]) "sword". Iaido sword. Sword used for practice, so it is not as sharp as katana.

Deep breath. Deep breathing.

息吹 (ibuki) "deep breath" + の (no) "compound particle" + 法 (hō[1]) "method, principle". Method of deep breathing. Method of filling and emptying the lungs completely.

One (number).

一期 (ichi go) "once, a lifetime" + 一会 (ichi e) "an encounter, a coincidence". It is an idiom meaning "Every event happens once. Every event develops a different coincidence, a different encounter". It states that a technique repeated over and over in martial arts is actually a different case each time, and the same situation will not be experienced twice.

一眼 (ichigan) "first eye" + 二足 (nisoku) "second step" + 三胆 (santan) "third courage" + 四力 (shiriki) "fourth strength". It states that in martial arts, it is necessary to see first and then act, and not to act by heart. Then, thirdly, the movement must be continued with courage and determination, and fourthly, the technique must be performed strongly.

一 (ichi) "one (number)" + 文字 (monji) "character, script". Horizontal and straight line. Horizontal cut in aikido, iaido, kenjutsu.

一霊 (ichirei) "one spirit" + 四魂 (shikon) "four souls" + 三元 (sangen) "three basis" + 八力 (hachiriki) "eight powers". Elements that make up the structure of man and the universe in Shintō belief. There is a spirit (ichirei) in each human and this spirit consists of  four souls (shikon). These are the elements of the human dimension of the building. There are 3 bases (sangen) that make up the universe (see sangen) and there are 8 forces that affect the universe. These 8 powers are in 4 opposite groups of 2 (see hachiriki).

移 (i) "transfer, translation" + 動 (dō[3]) "movement". Moving, changing.

居 (i[1]) "being, existing, sitting" + 捕 (tori[1]) "taking, grabbing, the one who applies the technique". Attacking or catching the one who sits in seiza.

家 (ie) "family, house, home" + 元 (moto) "head, foundation, basis, principle, cause". The family line which succeeds a school, the leadership that passes down from father to son.

Breath.

一 (ichi) "one (number)" + ヶ条 (kajō) "article, item". First item. The name of the first technique in Daitō-ryū and in some aikidō schools.

一 (ichi) "one (number)" + 拳 (ken[2]) "fist, punch" + 必 (hitsu) "certain, inevitable" + 殺 (satsu) "death". Certain death in one punch. A concept from karate.

一 (ichi) "one (number)" + 教 (kyō[1]) "teaching, doctrine, instructing". The first basic technique in aikidō.

一教 (ikkyō) "ikkyō" + 投げ (nage) "throw, thrower". A ikkyō that ends with a throw, not with an osae (pinning).

一教 (ikkyō) "ikkyō" + 運動 (undō) "physical exercise". Ikkyō exercise. The exercise of raising the arms in the air as if someone is grabbing the wrist.

一 (ichi) "one (number)" + 級 (kyū[2]) "level, grade, class, white belt degree". First white belt degree (kyū).

生 (iku) "animating, refreshing" + 産霊 (musubi[2]) "birth-giver, creator". The force which gives life to things in the universe in Shintō belief. It is symbolized by the triangle (三角, sankaku). It corresponds to human (人, jin) in the trinity called Sangen.

生 (iku) "animating, refreshing" + 魂 / 霊 (tama[1]) "soul, spirit". A spirit known for giving life/energy in Japanese mythology.

陰 (in) "shadow, unknown, negatif, feminine, the moon" + の (no) "compound particle" + 構え (kamae) "stance, posture, a ready stance". The sword stance in which the sword is held near the head, in front of the shoulder and pointing the sky.

陰 (in) "shadow, unknown, negatif, feminine, the moon" + 陽 (yō) "light, open, positive, masculine, the sun". Ying yang. Two fundamental forces, which are opposite but complementary to each other, acting on nature in the Chinese conception of the universe. In (陰) represents the passive, feminine, cold, dark force and yō (陽) represents the active, masculine, hot, bright force.

Prayer.

入り (iri) "entering, going in, putting in" + 身 (mi[1]) "body". Entering the body. As a defender, moving forward behind, near or to the center of the opponent. The distinction between irimi and tenkan can be thought of as the distinction between omote and ura.

入り身 (irimi) "irimi" + 一足 (issoku) "one step". The principle of entering and getting to the back of the opponent in one step.

入り身 (irimi) "irimi" + 投げ (nage) "throw, thrower". A throwing technique where the defender gets (enters) to the back of the uke, unbalances him/her and applies the throw.

入り身 (irimi) "irimi" + 転換 (tenkan) "tenkan". Entering with a forward step and turning afterwards. One of the most basic tai sabaki in aikidō.

入り身 (irimi) "irimi" + 運動 (undō) "physical exercise". Irimi exercise.

威 (i[2]) "power, force" + 力 (ryoku) "power, force". Power, strength.

以心 (ishin) "from one heart" + 伝心 (denshin) "transfer to other's heart". Transmission from one heart to another. An idiom from Buddhism which refers to the interpersonal nonverbal communication.

一足 (issoku) "one step" + 一刀 (ittō) "one cut" の (no) "compound particle" + 間合い (maai) "interval". The distance at which a cut can be made with one step.

Unity, togetherness, harmony, cooperation.

いつも (istumo) "always" + 真ん中 (mannaka) "in the center". Always in the center, always to the center.

Inviting, tempting. Tempting the opponent to strike.