unstructured
/ˌʌnˈstrʌktʃəd/adjective
1- without formal organization or structure没有正式组织的; 没有正式结构的：
an unstructured interview.
没有预先组织好的访谈。
1.1
- (of a garment) made with little or no interfacing or other material which would give definition to its shape（服装）制作时不用（或少用）内衬的。