- boi'e'u
- mekso operator/function terminator (in Polish notation): inserts exactly enough "{boi}"'s consecutively so as to terminate the most recently uttered operator/function in a mekso expression
- fe'ei
- binary mekso operator: divided by (fraction): a/(b...)
- kei'au
- mekso operator: finite result set derived from/on set A with/due to operator/function B under ordering of application C
- mu'i'u
- base-dependent digit: representing exactly one half of one more than the maximum possible single-digit number expressible in the relevant number base
- vu'ai
- base-dependent digit: the maximum possible single-digit number expressible in the relevant number base.