[合「あ」]う => To do A together/mutually N4
Secondary Verb
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
というより => Rather than A N3
Comparison, Exchange
やる => Give B to A N4
Give and take advice
てやる => Do for someone N4
Give and take advice
やすい => A is easy to do N4
Verb Suffixes
より~の[方「ほう」]が~ => B is more C than A N4
Comparisons
てくれてありがとう => Thank you for doing A N4
Honorifics
なり~なり => A or B N1
Lists, examples
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