Annoying means making you a little angry again and again. An annoying noise, deeply annoying, that is annoying.
The repetition is part of it — an annoying thing is usually small and persistent, like a dripping tap. It is one of the most-used mild complaints in English. Note annoyed, which describes the person, and annoying, which describes the cause, following the same pattern as bored and boring; annoyance, the noun; and that annoying is far commoner in speech than irritating, which sounds a shade more formal.
1adjectiveannoyingMaking you a little angry again and again.
“There is an annoying noise from somewhere under the floor.”
synonyms: irritating, aggravating
annoying is a quality of causing irritation.
Also accepted in games: irritating
Middle English
anoyen
English
annoy
English, today
annoying
From annoy + -ing. annoy comes from Middle English anoyen. From Middle English anoyen, from Old French enoiier (“to bother, disturb”), from Latin inodio (“to make loathsome”), derived from Latin odium (“loathing, hatred”). Displaced native dreċċan, gremman.
Etymology from Wiktionary, CC BY-SA