~をかわきりに(~を皮切りに)      => One after another; starting with ~ N1
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
切る => Give up, stop... N3
Happens next
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
きり => Only A N3
Degree. Level, Amount
きり => only; just; since; after ~ N2
きり => only; just; since; after ~ N3
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
[極「きわ」]み/[極「きわ」]まりない => Extremely A N1
Degree/ Level/Amount
をかわきりに => Starting with A N1
Miscellaneous
てっきり...と思う => surely; certainly; without a doubt N3
いきなり => abruptly; suddenly; all of a sudden; without warning N2