This is the 2514th most frequent Korean word.
말하기
Speaking.
Here, '말하기' is used as a noun derived from the verb '말하다', combined with the nominalizing suffix '-기' to mean 'the act of speaking'.
한국어 말하기를 연습해야 해요.
I need to practice speaking Korean.
In this sentence, '말하기' also functions as a noun indicating the skill or ability of speaking.
말하기 능력을 키우려면 매일 연습하세요.
To improve your speaking skill, practice daily.
Here, '말하기' functions as the subject of '좋아해요', emphasizing the act of speaking itself.