Usurp

Etymology

From Latin "usurpare" (to take into use, to seize possession), commonly analyzed as "usu" (by use) plus "rapere" (to seize) — the root of "rapacious." It came through Old French into English by the fourteenth century, carrying the specific charge of taking authority to which one has no legitimate right, as a pretender seizes a throne.

verb · /yoo-SURP/
To seize power, position, or rights that belong to another, without legitimate claim.
What it names
When a taking is not just forceful but wrongful — the offense lies in the lack of rightful title.
Example
The general dissolved parliament and usurped powers the constitution reserved for the courts.
Related idea
To seize power is merely to take it by force; to usurp is to take what is not rightfully yours — the wrong lies in the illegitimacy.