のが上手 => to be good at doing something N5
やがて => before long; soon; almost; eventually ~ N2
Short period of time
もはや~ない => no longer; not anymore N1
Invariant
またもや => again N3
Repetition, habit
や、やいなや => As soon as A, B N1
Time, Situation
の上で(は)/~上 => according to; from the viewpoint of ~ N2
上 => In terms of... N1
Position, perspective
よもや => surely (not); certainly (not) N1
Emphasize the negative meaning
~やたらに => randomly; recklessly; blindly N1
Emphasis on degree
が[早「はや」]いか => As soon as A occurred, right after A N1
Time, Situation
上に => as well; besides; in addition to; not only… but also ~ N2
いまや => now, these days N3
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