pain in the ass(something that causes discomfort) noun [UK: peɪn ɪn ðə æs] [US: ˈpeɪn ɪn ðə ˈæs]
seccaturanoun {f}
annoyance [annoyances](that which annoys) noun [UK: ə.ˈnɔɪəns] [US: ə.ˌnɔɪəns]They tried to hide their annoyance. = Provarono a nascondere la loro seccatura.