expression, godan verb (-ku)
General expression for speaking or talking; often used in negative or conditional forms to indicate (not) saying something or (not) being on speaking terms.
彼は最近、私と口をきいてくれない。
He hasn't spoken to me lately.
そんなこと、口をきくのも嫌だ。
I don't even want to talk about such a thing.
expression, godan verb (-ku)
mediate; act as a go-between; put in a good word
Used when someone intercedes or negotiates on behalf of another; often involves using influence or connections.
先輩が口をきいてくれて、やっと仕事が見つかった。
My senior put in a good word for me, and I finally found a job.
彼は両者の間で口をきいて、和解させた。
He mediated between the two parties and brought about a reconciliation.