に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
に先立って => before; prior to ~ N2
ひとつ…できない => cannot do the bigger things N3
Ability
きり => Only A N3
Degree. Level, Amount
つきましては => about; concerning; regarding N2
Cause, reason
につき => due to; because of; per; each N2
きり => only; just; since; after ~ N2
きり => only; just; since; after ~ N3
[極「きわ」]み/[極「きわ」]まりない => Extremely A N1
Degree/ Level/Amount
つまり => in other words; in summary N3
いきなり => abruptly; suddenly; all of a sudden; without warning N2