Sui generis
Sui generis (; ) is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique."
Cisgender
"Cisgender" has its origin in the Latin-derived prefix "cis-", meaning "on this side of", which means the opposite of "trans-", meaning "across from" or "on the other side of". This usage can be seen in the cis–trans distinction in chemistry, the cis–trans or complementation test in genetics, in Ciscaucasia (from the Russian perspective), in the ancient Roman term Cisalpine Gaul (i.e., "Gaul on this side of the Alps"), Ciskei and Transkei (separated by the Kei River), and more recently, Cisjordan, as distinguished from Transjordan. In the case of gender, "cis-" describes the alignment of gender identity with assigned sex.