IPA: /ˈkɒlərɪk/
KK: /ˈkɒlərɪk/
Someone who gets angry easily or is often in a bad mood.
His choleric nature made it difficult for him to keep friends.
Choleric is derived from the Greek word "chole" (meaning bile) and the suffix "-ic" (meaning pertaining to). The term originally referred to a temperament associated with an excess of bile, which was believed to cause anger or irritability, hence describing a person who is easily angered or bad-tempered.
Think of 'bile' ('chole') being linked to anger, and remember that 'choleric' describes someone who is easily angered.