さえ/にさえ/でさえ => Even N3
Not only, Not even
さえ/でさえ => even; so much as; not even N3
さえ...たら => Just...is enough N3
Conditions (sufficient conditions)
~にたえる (耐える)    => bear doing ~ N1
~さえ…ば => if only; as long as ~ N3
Conditions (sufficient conditions)
ただでさえ => ordinary; usual... also... N2
Description
を[余儀「よぎ」]なくされる => Must do A N1
Will, Decision, Doing
させてください/させてもらえますか/させてもらえませんか => please let me do N3
NがNを/にV-させる => Who (N) makes...who (N) do what N4
Coercion
をして…させる => to make somebody do something, to let somebody do something N2
Allow
NがNをV-させる => to make somebody do something. to let somebody do something N4
Conjugate verbs
ざるを[得「え」]ない => Only A is left to do/can be done N2
(Not)only, (Not) even