一言不合

yīyánbùhé
(idiom) to have a disagreement; to clash verbally

CEDICT

說一句話就不投機。

重編國語辭典

Entry Composition

1 一言 yīyán
  1. one sentence
  2. brief remark
2 不合 bùhé
  1. to not conform to
  2. to be unsuited to
  3. to be out of keeping with
  4. should not
  5. ought out