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Etymology
From.

Verb

 * 1)  to block
 * 2)  to block
 * 3)  to lock
 * 4)  to block
 * 5)  to block
 * 6)  to block
 * 7)  to block an opponent
 * 8)  to protect technical equipment
 * 9)  to be impossible to pass
 * 10)  to be blocked
 * 11)  to inhibit oneself
 * 1)  to inhibit oneself