What is meaning of sui juris in law?

Legal Definition of sui juris

1 : having full legal capacity to act on one’s own behalf : not subject to the authority of another.

What is a sui juris beneficiary?

Sui juris means a person who is in esse and not a minor or otherwise.

Who is not sui juris?

[Latin, Not his own master.] A term applied to an individual who lacks the legal capacity to act on his or her own behalf, such as an infant or an insane person.

How do you pronounce Sui Juris?