合う => do something together N3
中 => While (Lasting) N3
Continuous
途中で/途中に => on the way; in the middle of ~ N4
中 => During the period (Term) N3
Time
~こと請け合い => I guarantee ... N1
Happens next
[合「あ」]う => To do A together/mutually N4
Secondary Verb
を中心に => focused on; centered on~ N2
場合(は) => in the event of; in the case that ~ N4
最中に => while; during; in the middle of ~ N3
~ににあわず (に似合わず ) => ~Different from N1
Evaluate
途中 (は) => on the way; in the middle of ~ N3
Halfway
中 => Throughout, all over, during the course of N5
Time