やすい => A is easy to do N4
Verb Suffixes
や、やいなや => As soon as A, B N1
Time, Situation
[少「すこ」]しも~ない => Not (even a little) A N3
Not only, Not even
[使「し」][役「えき」][受「う」]け[身「み」] => Imperative N4
Causative, Passive, Volitional
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples
てやまない => To (always) think/feel/hope/etc. A N1
Will, Decision, Doing
てやる => Do for someone N4
Give and take advice
やる => Give B to A N4
Give and take advice
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility
が[早「はや」]いか => As soon as A occurred, right after A N1
Time, Situation
に[反「はん」]して/に[反「はん」]し/に[反「はん」]する/に[反「はん」]した => In contrast to A N2
Contrast,Surprise
と[思「おも」]いきや => Even though A (was thought/expected), different result B N1
Contrast/Surprise