の[末「すえ」]/た[末「すえ」] => conclusion N2
Reason, Result, Response
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility
さえ/にさえ/でさえ => Even N3
Not only, Not even
といえば/というと/といったら => N3
Considering, Concerning
やすい => A is easy to do N4
Verb Suffixes
ござる/ございます => Have~ N4
Honorifics
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
すら,ですら => Even A N1
(Not)only , (Not) even
にたえる/にたえない => Can't do A, can't stand/tolerate A, Can do A, N1
Potential, Possibility
といえども => Even if A, even though A N1
Contrast/Surprise
かといえば => Although A is expected, B results N2
Contrast,Surprise
にすぎない => Only A; No more than A N2
(Not)only, (Not) even