- kumfa
- x
_{1}is a room of/in structure x_{2}surrounded by partitions/walls/ceiling/floor x_{3}(mass/jo'u).

- xa'ei'o
- binary mekso operator: Let the inputs X
_{1}and X_{2}be sets in the same universal set O; then the result of this operator applied to them is X_{1^c \cup X}, where for any A \subseteq O, A^{c }= O \setminus A.