Yoi - Attention. Usually called if an attention stance is wanted.
Yoko - Side i.e. Yoko Geri - 'Side Kick'
Yoko shiho gatame - Side four quarters hold
Yokomen - Side of the head
Yondan - 4th Degree Black Belt
Yubi - Finger
Yudansha - Person holding a grade of Shodan, or above.
Z
Za - Kneeling position
Zanshin - 'Lingering Spirit' - Awareness. Keeping a connection with the attacker even after he/she is on the ground. Awareness should
not be concentrated on one person, or point, but the entire area, so that other attacks can be anticipated.