zilrirci lujvo

The property x1 is rare/unusual/uncommon among x2

See also zilfadni, kampu, rirci.

In notes:

f2 (ka) is an ordinary / common / general / typical / usual property among f3.
kai'i (exp!)
Property relativizing determiner / unary quantifier constructor. {kai'i} introduces a predicate whose first argument slot becomes filled by the property made by taking the bridi in which this {kai'i} appears and putting {ce'u} into the argument slot in which this {kai'i} argument was located. Put formally, "kai'i brodi cu brodu" = "lo ka ce'u brodu cu brodi". Additionally, a {kai'i} term has a rightward logical scope, like quantifiers and adverbials.