てやる => Do for someone N4
Give and take advice
やる => Give B to A N4
Give and take advice
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
てやまない => To (always) think/feel/hope/etc. A N1
Will, Decision, Doing
やすい => A is easy to do N4
Verb Suffixes
てみる => Try to A N4
Secondary Verb
~ている。 => Doing something temporarily. N5
Secondary Verbs
てくれる => Do for someone. N4
Give and take advice
がっている => Want, like N4
Secondary Verb
てあげる => Help, do for N4
Give and take advice
てくる => To come, to continue N4
Secondary Verb