unnatural /ˌʌnˈnætʃərəl/ adjective Learner's definition of UNNATURAL
[more unnatural; most unnatural]
: not natural不自然的: such as
a : different from how things usually are in the physical world or in nature反自然的;不合乎自然规律的 b : different from what is normal in a way that is seen as wrong, disturbing, etc.违反常情的;不正常的