~こと請け合い => I guarantee ... N1
Happens next
合う => do something together N3
[合「あ」]う => To do A together/mutually N4
Secondary Verb
場合(は) => in the event of; in the case that ~ N4
~ににあわず (に似合わず ) => ~Different from N1
Evaluate
よりいっそ => I'd rather... than... N2
Description
…どうりがない => No reason... N2
Emphasize negative meaning
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
というより/というか => rather than ~ N3
あまり~ない => not very, not much ~ N5
よりない => to have no choice but ~ N3
Limit
さっぱり…ない => nothing/ absolutely not… N2
Position, perspective