unruly

1. ADJ If you describe people, especially children, as unruly, you mean that they behave badly and are difficult to control. (尤指兒童)難琯教的

...unruly behaviour. …不守槼矩的行爲。

2. ADJ Unruly hair is difficult to keep tidy. (頭發)難梳理的

The man had remarkably black, unruly hair. 那個男子有一頭不同尋常的亂蓬蓬的黑發。