unimportant       
adjective uk/ˌʌn.ɪmˈpɔː.tənt/ us/ˌʌn.ɪmˈpɔːr.t̬ənt/
B1 不重要的,无足轻重的
not important
  Staffing is still a relatively unimportant issue compared to our other problems. 与我们面对的其他难题相比,员工问题相对而言无足轻重。 
 - More examples
 - There's no point in arguing over something so unimportant.
 - These facts are unimportant in themselves , but if you put them together, they are more significant.
 - Don't get too preoccupied with unimportant details.
 - The education of girls was considered unimportant.
 - This problem is relatively unimportant when you consider other issues.