/ frʌˈstreɪtɪŋ; NAmE ˈfrʌstreɪtɪŋ/ adjective
causing you to feel annoyed and impatient because you cannot do or achieve what you want :
It's frustrating to have to wait so long.
► frus·trat·ing·ly adverb :
Progress was frustratingly slow.
/ frʌˈstreɪtɪŋ; NAmE ˈfrʌstreɪtɪŋ/ adjective
causing you to feel annoyed and impatient because you cannot do or achieve what you want :
It's frustrating to have to wait so long.
► frus·trat·ing·ly adverb :
Progress was frustratingly slow.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005