The base of the word "usurpation" is "usurp". "Usurp" means to seize power or authority without legal right. "Usurpation" refers to the act of wrongfully seizing power or authority.

Rural women suffered from land usurpation throughout the last five decades.

To usurp is to take or use something without the right to do so.

Example sentences:

It is wrong to usurp the computer connection from your brothers.

The general planned to usurp the powers of the elected government.

undermining someones athority

Also means entry to anothers property without right or permission

Rulers usually inherited their titles. Sometimes, as in the case of Richard III, they took the titles by usurpation.