sui-

(Latin: self, of oneself)

sui generis
Of its own kind.

"Unique, in a class by itself." Having a distinct character of its own; unlike anything else.

sui juris (Latin legal term)
Translation: "Of his or her own right."

"Of full legal capacity."

suicidal
suicidally
suicidology
suicism
suigenderism
suimate
Uxor non est sui juris, sed sub potestate viri.
A legal term meaning: A wife is not her own mistress, but is under the power of her husband.