Sui generis
In local government, a "sui generis" entity is one that does not fit with the general scheme of local governance of a country. For example in England, the City of London and the Isles of Scilly are the two "sui generis" localities, as their forms of local government are both (for historical or geographical reasons) very different from those of elsewhere in the country. 
In a press conference during which reporters were trying to analyse his political personality, Huey Long said, "...say that I am "sui generus", and let it go at that."
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.