To disturb or irritate, especially by continued or repeated acts; to bother with unpleasant deeds.

"Marc loved his sister, but when she annoyed him he wanted to switch her off."

To do something to upset or anger someone; to be troublesome.

To molest; to harm; to injure.

"to annoy an army by impeding its march, or by a cannonade"

That which annoys; an annoyance.

Causing irritation or annoyance; troublesome; vexatious.

"Vandals are really annoying."