ただでさえ => ordinary; usual... also... N2
Description
さえ/にさえ/でさえ => Even N3
Not only, Not even
~にたえる (耐える)    => bear doing ~ N1
さえ/でさえ => even; so much as; not even N3
の[末「すえ」]/た[末「すえ」] => conclusion N2
Reason, Result, Response
さえ...たら => Just...is enough N3
Conditions (sufficient conditions)
~ひょうしに(~拍子に)   => the moment [A], unintentionally / inadvertently caused something to happen N1
にこたえ(て) => in response to ~ N2
たまえ => do~; order somebody to do something N2
Order
の[上「うえ」]では => As… N4
Situations and Experiences
たとえ~ても => even if… is the case N3
にたえる/にたえない => Can't do A, can't stand/tolerate A, Can do A, N1
Potential, Possibility