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
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
切る => Give up, stop... N3
Happens next
~をかわきりに(~を皮切りに)      => One after another; starting with ~ N1
これ/それ/あれ => this/that N5
Spatial relations
~かれ~かれ      => sooner or later; more or less N1
であれ~であれ => whether [A] or [B] N1
…けれど => Explanation N3
Exclamatory
かれ~かれ => A or B N1
Lists, examples
それを => Despite that ... N2
Things do not match the prediction
それでは => Well then N4
Change the subject of the story
けれど => but; however; although N4
How to say the beginning