の下で/の下に => under; with ~ N2
切る => Give up, stop... N3
Happens next
一体 => …the heck; …in the world; …on earth N3
切る/切れる/切れない => to do something completely to the end/unable to do; too much to finish/complete N3
を除いて => except; with the exception of; excluding ~ N2
以下 => As follows, below N3
Standard
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
のが下手 => to be bad at doing something N5
て[下「くだ」]さる => Do for someone N4
Give and take advice
~をかわきりに(~を皮切りに)      => One after another; starting with ~ N1
[以下「いか」] => Less than A, under/below A (amount) N1
Degree/ Level/Amount
て下さいませんか => Please do A (polite) N5
Asking and Telling