The difference between Abjure and Abrogate

When used as verbs, abjure means to renounce upon oath, whereas abrogate means to annul by an authoritative act.

Abrogate is also adjective with the meaning: abrogated.

check bellow for the other definitions of Abjure and Abrogate

Abjure as a verb (transitive):

to renounce upon oath; to forswear; to disavow.

Examples:

"To abjure allegiance to a prince."

"To abjure the realm (''to swear to abandon it forever'')."
Abjure as a verb (transitive, obsolete, historical):

to cause one to renounce or recant.
Abjure as a verb (transitive):

to reject with solemnity; to abandon forever; to repudiate; to disclaim.

Examples:

"To abjure errors."
Abjure as a verb (transitive):

to abstain from; to avoid; to shun.

Abrogate as a verb (transitive):

To annul by an authoritative act; to abolish by the authority of the maker or her or his successor; to repeal; — applied to the repeal of laws, decrees, ordinances, the abolition of customs, etc.
Abrogate as a verb (transitive):

To put an end to; to do away with.
Abrogate as a verb (molecular biology, transitive):

To block a process or function.