ざるを[得「え」]ない => Only A is left to do/can be done N2
(Not)only, (Not) even
や、やいなや => As soon as A, B N1
Time, Situation
を[禁「きん」]じ[得「え」]ない => Can't help but do A, can't hold back from A (emotional response to something) N1
Will, Decision, Doing
に[難「むずか」]くない => It's not hard to A N1
Adjectival, Descriptions
てやまない => To (always) think/feel/hope/etc. A N1
Will, Decision, Doing
をおいて~ない => Other than A, B N1
(Not)only , (Not) even
やすい => A is easy to do N4
Verb Suffixes
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples
[向「む」]け => Made for A, intended for A N2
Adjectival, Descriptions
やる => Give B to A N4
Give and take advice
てやる => Do for someone N4
Give and take advice
が[早「はや」]いか => As soon as A occurred, right after A N1
Time, Situation