さん => Mr., Mrs., Ms. N5
Respectful, humble
~なさんな => (Please) do not, Do not, Don't (prohibitive) N1
Ban
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
くださいませんか => Could(Would) you please N4
いささか => a bit N3
Evaluate
て下さいませんか => Please do A (polite) N5
Asking and Telling
さ => -ness N4
させていただけませんか => Could you please let me do... N4
さえ/にさえ/でさえ => Even N3
Not only, Not even
をくださいませんか => Please give me A (polite) N5
Asking and Telling
さあ => well N3
Suggestion
さえ/でさえ => even; so much as; not even N3