[際「さい」]して/に([際「さい」]し)/に[際「さい」]しての => At the time of A (which starts now).. N2
Time, Situation
(さ)せてほしい => Please let me do N3
Allow
や、やいなや => As soon as A, B N1
Time, Situation
いささか => a bit N3
Evaluate
いまや => now, these days N3
Compare
や => ... or... N5
Line up, list
や否や => as soon as; the moment ~ N1
てさしあげる => Do for N4
Give and take advice
や => and; or N5
てさしあげる => to do something for somebody N4
Respectful, humble
もはや~ない => no longer; not anymore N1
Invariant
いっさいない => Not at all N2
Emphasize negative meaning