に[加「くわ」]えて/に[加「くわ」]え => In addition to A (not only A), B as well. N2
Lists, Examples
さえ/にさえ/でさえ => Even N3
Not only, Not even
~にたえる (耐える)    => bear doing ~ N1
いかに … とはいえ => What ever... N3
Things do not match the prediction
~やむをえず  => unavoidable, no other way to do something N2
Necessity, obligation
てやってもらえないか => Could you...help me, please? N3
Suggestion
にたえる/にたえない => Can't do A, can't stand/tolerate A, Can do A, N1
Potential, Possibility
ゆえに => Because of A N1
Reason, Result, Response
てやってもらえるか => Could you please... help me? N4
Suggestion
にこたえ(て) => in response to ~ N2
もらえまいか => Help... N2
Benefit
さえ/でさえ => even; so much as; not even N3