DictionaryirritableEasily annoyed
adjective

irritable

IR-ih-tuh-bul/ˈɪrɪtəbl/

Readily reacting unpleasantly to stimulation.

The irritable man reacts sharply to his colleague's quiet pen tapping.

A young man reacts with disproportionate irritation to a nearby colleague's idle pen tapping: he twists toward the tiny disturbance with tightly knitted brows, a tense jaw and a sharp stop gesture, while the colleague looks surprised.
Etymology

The pieces express being readily provoked or excited. The Latin adjective meant “easily excited”; the selected English sense focuses that susceptibility on annoyance or anger.

In context

Enhanced Public Domain40:08
the next time you feel yourself becoming irritable use your will and be patient this is a very good exercise in self-control
1900s Philosophy: Theron Q. Dumont - The Power of Concentration (Audiobook)

More examples

  • Lack of sleep makes him more irritable than usual.
  • The irritable customer snaps at the cashier over a small delay.
  • An irritable bladder can cause frequent urges to urinate.

Forms

irritable · more irritable · most irritable

irritability noun — The tendency to become annoyed easily.

irritably adverb — In a way that shows annoyance.

Similar words

cranky
Informally describes someone in a bad or complaining mood.
touchy
Emphasizes being easily offended, especially by comments or criticism.
sensitive
Describes responsiveness to stimuli without necessarily implying annoyance or discomfort.