noun
A verbal argument or exchange of angry words; often implies a back-and-forth exchange rather than a one-sided complaint.
ささいなことで言い合いになった。
We got into an argument over a trivial matter.
言い合いをしても解決にはならない。
Arguing won't solve anything.
Compound of 言い (the continuative form of 言う 'to say') + 合い (the continuative form of 合う 'to do mutually'), literally 'saying to each other'.