n. 25B6; noun ANNOYANCE, (source of) irritation, thorn in someone's side/flesh, pest, bother, trial, torment, plague, inconvenience, nuisance; informal aggravation, peeve, pain (in the neck), headache; N. Amer. informal nudnik, burr in/under someone's saddle; Austral./NZ informal nark.
IRRITANT
Meaning of IRRITANT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012