The term cis is silly

 .From the Latin preposition cis (“on this side of”). The earliest known gender-related use of the prefix in any language was in a 1914 German-language book on sexology.^[1] According to the Oxford English Dictionary, the earliest use of the prefix in the context of gender in English dates from 1994.^[2 

^{How can a CIs person be cis? You by nature are on the same side as yourself!}