使役形 => Causative form N4
~V使役受身      => causative-passive form N4
Conjugate verbs
や、やいなや => As soon as A, B N1
Time, Situation
てやる => Do for someone N4
Give and take advice
やる => Give B to A N4
Give and take advice
~やたらに => randomly; recklessly; blindly N1
Emphasis on degree
[使「し」][役「えき」] => Coercive, permission, allow, make N4
Causative, Passive, Volitional
いまや => now, these days N3
Compare
やなにか => the same, equivalent to N4
Demonstrate by example
なにやら => something, some kind of N2
Vague
~ないでいる/~ずにいる => ~Still not... N1
Invariant
や => ... or... N5
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