also: いきちがう
godan verb (-u), intransitive verb
cross each other; pass each other
Physical movement: two people or things moving in opposite directions and passing by each other.
狭い道で車が行き違うのは難しい。
It's difficult for cars to pass each other on a narrow road.
godan verb (-u), intransitive verb
Failing to meet as planned, or messages/letters crossing in transit.
彼と行き違って会えなかった。
I missed him and couldn't meet him.
手紙が行き違ったようだ。
It seems our letters crossed in the mail.
godan verb (-u), intransitive verb
have a misunderstanding; go awry; clash
Opinions, intentions, or feelings not aligning; a disagreement or conflict arising from miscommunication.
話が行き違って喧嘩になった。
Our conversation went awry and turned into a fight.