The key to the meaning of irascible isn't the negating prefix ir- (which is the form of the prefix in- that is used before words beginning with " r" ), but rather the Latin noun ira, I-R-A, meaning " anger" .

irascible 含义的关键不是否定前缀 ir-（这是前缀 in- 的形式，用在以“r”开头的单词之前），而是拉丁语名词 ira，I-R-A，意思是“愤怒” 。