-icity
(ˈɪsɪtɪ)
a compound suffix, a. F. -icité, ad. L. -icitāt-em (nom. -icitās), formed by the addition of the suffix -tāt- (see -ty) to adj. stems in -ic(i), as rusticitās, lubricitās, f. rustic-us, lubric-us. On the analogy of these (perh. also influenced by ns. like simplicitās, felīcitās from simplex, felix), abstract ns. in -icité in Fr. and -icity in Eng. are formed freely upon adjs. of any origin in -ic: e.g. apostolicity, atomicity, authenticity, catholicity, domesticity, eccentricity, elasticity, electricity, publicity.