This is the 1099th most frequent Japanese word.
話す
To speak or talk.
話す is used here to indicate the act of engaging in conversation with another person.
彼と話すことが楽しいです。
Talking to him is enjoyable.
話す is used here to denote the skill or act of speaking a language.
英語を話すのは簡単ではありません。
Speaking English is not easy.
話す is used here to indicate discussing or conversing about a specific topic.