ざるを得ない => cannot help (doing); have no choice but to ~ N2
ざるを[得「え」]ない => Only A is left to do/can be done N2
(Not)only, (Not) even
~をきんじえない(~を禁じ得ない) => can't help but; can't refrain from ~ N1
得る => can; to be able to; is possible to~ N2
[時「とき」] => At the time A N5
Time
と同時に => at the same time as; while; simultaneously ~ N2
Vた[時「とき」] => After having done something N5
Time
...を...みる => judging from; seeing that ~ N4
Deduce
...を...にする => to make something ~ N4
Purpose, target
姿を見せる => figure; appearance N3
Ability
得ない => unable to; cannot; it is not possible to ~ N2
Ability
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