讨厌 has two main uses: as a verb meaning "to dislike" (general dislike, less strong than 厌恶 'loathe' and less specific than 嫌 'dislike for being unsatisfactory') and as an adjective meaning "annoying, troublesome" (describes something that bothers you, while 麻烦 focuses on inconvenience and 烦 on feeling vexed). It's a common, everyday word.