[後「あと」]で => After V1, V2 N5
Time
や、やいなや => As soon as A, B N1
Time, Situation
やなんか => Something like... N3
Vague
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
やなにか => the same, equivalent to N4
Demonstrate by example
なにやら => something, some kind of N2
Vague
や => ... or... N5
Line up, list
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report
や否や => as soon as; the moment ~ N1
もはや~ない => no longer; not anymore N1
Invariant
や => and; or N5
やらなにやら => In addition to the facts / things, there are many other things like that … N2
Demonstrate by example