Expressions (phrases, clauses, etc.), Godan verb with 'u' ending
to get along (with someone); to be like-minded; to be congenial
私はきっと彼と気が合うと思います。私たちは同じ県の出身だから。I am sure I'll get along with him because we are from the same prefecture.
Also written 気があう【きがあう】