a-
1.PREFIX 前缀(用在形容词前构成反义形容词）表示“非”，“无” A- is added to the beginning of some adjectives in order to form adjectives that describe someone or something that does not have the feature or quality indicated by the original word.
I'm a completely apolitical man...
我对政治毫无兴趣。
She was amoral but honest.
她是个真小人。
...asymmetrical shapes.
不对称的形状
