On grammatical class:

za
time tense distance: medium distance in time.
zi
time tense distance: instantaneous-to-short distance in time.
zu
time tense distance: long distance in time.
za'ai
time tense distance: an unspecified distance in time

In definition:

cmavrzi
x1 is the selma'o "ZI".

In notes:

sepcau
s1 is immediately next to x2.
temsepcau
c1=s1 is immediately next to s2 in time.