やすい => A is easy to do N4
Verb Suffixes
や、やいなや => As soon as A, B N1
Time, Situation
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples
やる => Give B to A N4
Give and take advice
てやる => Do for someone N4
Give and take advice
すら,ですら => Even A N1
(Not)only , (Not) even
の[末「すえ」]/た[末「すえ」] => conclusion N2
Reason, Result, Response
くする/にする => To make, to change into N5
Change, cause and effect
てやまない => To (always) think/feel/hope/etc. A N1
Will, Decision, Doing
が[早「はや」]いか => As soon as A occurred, right after A N1
Time, Situation
んです => Because, by… N4
Situations and Experiences
と[思「おも」]いきや => Even though A (was thought/expected), different result B N1
Contrast/Surprise