irritable

形容词 irritable:

1. easily irritated or annoyed
   同义词：cranky, fractious, nettlesome, peevish, peckish, pettish, petulant, scratchy, testy, tetchy, techy
2. abnormally sensitive to a stimulus
3. capable of responding to stimuli
   同义词：excitable

1. In a bad mood; irritable.
   情绪不好的; 易发怒的
2. He's always in a bad mood (ie irritable and angry) on Mondays.
   他每星期一情绪都很坏。
3. The old man is an irritable person.
   那个老人是个易怒的人。
4. The substance is irritable to sensitive skin.
   这种物质对敏感的皮肤有刺激性。

ir.ri.ta.ble

adj.（形容词）
Easily irritated or annoyed.
易怒的：容易心烦或激怒的
Pathology Abnormally sensitive to a stimulus.
【病理学】 过敏的：对刺激不正常地敏感的
Physiology Capable of responding to stimuli.
【生理学】 应激性的：能对刺激作出反应的

来源：
French irritable
法语 irritable
from Latin irrot3bilis
源自 拉丁语 irrot3bilis
from irrot3re [to irritate]
源自 irrot3re [使恼怒]

【引伸】
ir.ritableness
n.（名词）
ir.ritably
adv.（副词）