person with whom to speak; someone to talk to; companion; advisor; adviser
彼は話し相手がいなくて寂しい。
He is lonely without anyone to talk to.
祖母はいつも話し相手を求めている。
My grandmother is always looking for someone to talk to.
新しい職場で話し相手ができて、毎日が楽しくなった。
At my new workplace, I found someone to talk to, and every day became more enjoyable.