from
The Collaborative International Dictionary of English v.0.48
Jujutsu \Ju"jut`su\, Jujitsu \Ju"jit`su\, Jiujutsu \Jiu"jut`su\,
Jiujitsu \Jiu"jit`su\ n. [Jap. j[=u]jutsu; j[=u] soft (prob.
because no weapons are used) + jutsu art.]
The Japanese art of self-defense without weapons, now widely
used as a system of physical training. It depends for its
efficiency largely upon the principle of making clever use of
an opponent's strength, weight, and movements to disable or
injure him, and by applying pressure so that his opposing
movement will throw him out of balance, dislocate or break a
joint, etc. It opposes knowledge and skill to brute strength,
and demands an extensive practical knowledge of human
anatomy.
[Webster 1913 Suppl.]