irritable
1. [ adjective ] easily irritated or annoyed
Synonyms: peevish fractious testy peckish pettish petulant nettlesome tetchy techy cranky
Examples:

"an incorrigibly fractious young man" "not the least nettlesome of his countrymen"

Related terms: ill-natured
2. [ adjective ] (pathology) abnormally sensitive to a stimulus
Related terms: pathology sensitive
3. [ adjective ] (physiology) capable of responding to stimuli
Synonyms: excitable
Related terms: physiology sensitive
Similar spelling:   irritably
  irritability